diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/PackagePartCodegen.java b/compiler/backend/src/org/jetbrains/jet/codegen/PackagePartCodegen.java
index ce2e7fda1da..d29f827b4c6 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/PackagePartCodegen.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/PackagePartCodegen.java
@@ -77,7 +77,7 @@ public class PackagePartCodegen extends MemberCodegen {
         );
         v.visitSource(jetFile.getName(), null);
 
-        writeKotlinPackageFragmentAnnotation();
+        writeKotlinPackagePartAnnotation();
 
         for (JetDeclaration declaration : jetFile.getDeclarations()) {
             if (declaration instanceof JetNamedFunction || declaration instanceof JetProperty) {
@@ -90,8 +90,8 @@ public class PackagePartCodegen extends MemberCodegen {
         v.done();
     }
 
-    private void writeKotlinPackageFragmentAnnotation() {
-        AnnotationVisitor av = v.newAnnotation(asmDescByFqNameWithoutInnerClasses(JvmAnnotationNames.KOTLIN_PACKAGE_FRAGMENT), true);
+    private void writeKotlinPackagePartAnnotation() {
+        AnnotationVisitor av = v.newAnnotation(asmDescByFqNameWithoutInnerClasses(JvmAnnotationNames.KOTLIN_PACKAGE_PART), true);
         av.visit(JvmAnnotationNames.ABI_VERSION_FIELD_NAME, JvmAbi.VERSION);
         av.visitEnd();
     }
diff --git a/compiler/tests/org/jetbrains/jet/codegen/KotlinPackageFragmentAnnotationTest.java b/compiler/tests/org/jetbrains/jet/codegen/KotlinPackagePartAnnotationTest.java
similarity index 75%
rename from compiler/tests/org/jetbrains/jet/codegen/KotlinPackageFragmentAnnotationTest.java
rename to compiler/tests/org/jetbrains/jet/codegen/KotlinPackagePartAnnotationTest.java
index 588a188e2c0..708d24540f7 100644
--- a/compiler/tests/org/jetbrains/jet/codegen/KotlinPackageFragmentAnnotationTest.java
+++ b/compiler/tests/org/jetbrains/jet/codegen/KotlinPackagePartAnnotationTest.java
@@ -27,7 +27,7 @@ import org.jetbrains.jet.lang.resolve.name.FqName;
 
 import java.lang.annotation.Annotation;
 
-public class KotlinPackageFragmentAnnotationTest extends CodegenTestCase {
+public class KotlinPackagePartAnnotationTest extends CodegenTestCase {
     public static final FqName PACKAGE_NAME = new FqName("test");
 
     @Override
@@ -36,7 +36,7 @@ public class KotlinPackageFragmentAnnotationTest extends CodegenTestCase {
         createEnvironmentWithMockJdkAndIdeaAnnotations(ConfigurationKind.JDK_ONLY);
     }
 
-    public void testKotlinPackageFragmentIsWritten() throws Exception {
+    public void testKotlinPackagePartAnnotationIsWritten() throws Exception {
         loadText("package " + PACKAGE_NAME + "\n\nfun foo() = 42\n");
         String facadeFileName = JvmClassName.byFqNameWithoutInnerClasses(PackageClassUtils.getPackageClassFqName(PACKAGE_NAME)).getInternalName() + ".class";
 
@@ -45,26 +45,26 @@ public class KotlinPackageFragmentAnnotationTest extends CodegenTestCase {
             String filePath = outputFile.getRelativePath();
 
             if (!filePath.equals(facadeFileName)) {
-                // The file which is not a facade is a package fragment
+                // The file which is not a facade is a package part
                 String fqName = filePath.substring(0, filePath.length() - ".class".length()).replace('/', '.');
-                Class aClass = generateClass(fqName);
+                Class<?> aClass = generateClass(fqName);
 
-                Class<? extends Annotation> annotationClass = loadAnnotationClassQuietly(JvmAnnotationNames.KOTLIN_PACKAGE_FRAGMENT.asString());
+                Class<? extends Annotation> annotationClass = loadAnnotationClassQuietly(JvmAnnotationNames.KOTLIN_PACKAGE_PART.asString());
 
-                assertTrue("No KotlinPackageFragment annotation on a package fragment",
+                assertTrue("No KotlinPackagePart annotation on a package part",
                            aClass.isAnnotationPresent(annotationClass));
 
-                Annotation kotlinPackageFragment = aClass.getAnnotation(annotationClass);
+                Annotation kotlinPackagePart = aClass.getAnnotation(annotationClass);
 
-                Integer version = (Integer) CodegenTestUtil.getAnnotationAttribute(kotlinPackageFragment, "abiVersion");
+                Integer version = (Integer) CodegenTestUtil.getAnnotationAttribute(kotlinPackagePart, "abiVersion");
                 assertNotNull(version);
-                assertTrue("KotlinPackageFragment annotation is written with an unsupported format",
+                assertTrue("KotlinPackagePart annotation is written with an unsupported format",
                            AbiVersionUtil.isAbiVersionCompatible(version));
 
                 return;
             }
         }
 
-        fail("No package fragment was found: " + outputFiles.asList());
+        fail("No package part was found: " + outputFiles.asList());
     }
 }
diff --git a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/AnnotationLoadingUtil.java b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/AnnotationLoadingUtil.java
index c5294611947..eef41980a24 100644
--- a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/AnnotationLoadingUtil.java
+++ b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/AnnotationLoadingUtil.java
@@ -18,7 +18,6 @@ package org.jetbrains.jet.lang.resolve.java;
 
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.jetbrains.jet.lang.resolve.java.JvmAnnotationNames;
 import org.jetbrains.jet.lang.resolve.name.FqName;
 import org.jetbrains.jet.lang.resolve.name.Name;
 
@@ -32,9 +31,12 @@ public final class AnnotationLoadingUtil {
     public static final FqName JETBRAINS_READONLY_ANNOTATION = new FqName("org.jetbrains.annotations.ReadOnly");
     public static final FqName JL_CLASS_FQ_NAME = new FqName("java.lang.Class");
 
+    @SuppressWarnings("deprecation")
     public static boolean isSpecialAnnotation(@NotNull FqName fqName) {
         return fqName.asString().startsWith("jet.runtime.typeinfo.")
             || fqName.equals(JETBRAINS_NOT_NULL_ANNOTATION)
+            || fqName.equals(JvmAnnotationNames.OLD_KOTLIN_CLASS)
+            || fqName.equals(JvmAnnotationNames.OLD_KOTLIN_PACKAGE)
             || fqName.equals(JvmAnnotationNames.KOTLIN_CLASS)
             || fqName.equals(JvmAnnotationNames.KOTLIN_PACKAGE);
     }
diff --git a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/JvmAnnotationNames.java b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/JvmAnnotationNames.java
index 8445ee4cb59..cb6c936f9a1 100644
--- a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/JvmAnnotationNames.java
+++ b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/JvmAnnotationNames.java
@@ -16,32 +16,29 @@
 
 package org.jetbrains.jet.lang.resolve.java;
 
-import jet.KotlinClass;
-import jet.KotlinPackage;
-import jet.KotlinPackageFragment;
-import jet.KotlinTraitImpl;
 import org.jetbrains.jet.lang.resolve.name.FqName;
 
-import static org.jetbrains.jet.lang.resolve.java.resolver.DescriptorResolverUtils.fqNameByClass;
-
 public final class JvmAnnotationNames {
-    public static final FqName KOTLIN_CLASS = fqNameByClass(KotlinClass.class);
-
-    public static final FqName KOTLIN_PACKAGE = fqNameByClass(KotlinPackage.class);
-
-    public static final FqName KOTLIN_PACKAGE_FRAGMENT = fqNameByClass(KotlinPackageFragment.class);
-
-    public static final FqName KOTLIN_TRAIT_IMPL = fqNameByClass(KotlinTraitImpl.class);
+    public static final FqName KOTLIN_CLASS = new FqName("kotlin.jvm.internal.KotlinClass");
+    public static final FqName KOTLIN_PACKAGE = new FqName("kotlin.jvm.internal.KotlinPackage");
+    public static final FqName KOTLIN_PACKAGE_PART = new FqName("kotlin.jvm.internal.KotlinPackagePart");
+    public static final FqName KOTLIN_TRAIT_IMPL = new FqName("kotlin.jvm.internal.KotlinTraitImpl");
 
     public static final String ABI_VERSION_FIELD_NAME = "abiVersion";
-
     public static final String DATA_FIELD_NAME = "data";
 
     @Deprecated
     public static final FqName OLD_JET_CLASS_ANNOTATION = new FqName("jet.runtime.typeinfo.JetClass");
-
     @Deprecated
     public static final FqName OLD_JET_PACKAGE_CLASS_ANNOTATION = new FqName("jet.runtime.typeinfo.JetPackageClass");
+    @Deprecated
+    public static final FqName OLD_KOTLIN_CLASS = new FqName("jet.KotlinClass");
+    @Deprecated
+    public static final FqName OLD_KOTLIN_PACKAGE = new FqName("jet.KotlinPackage");
+    @Deprecated
+    public static final FqName OLD_KOTLIN_PACKAGE_FRAGMENT = new FqName("jet.KotlinPackageFragment");
+    @Deprecated
+    public static final FqName OLD_KOTLIN_TRAIT_IMPL = new FqName("jet.KotlinTraitImpl");
 
     private JvmAnnotationNames() {
     }
diff --git a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/resolver/DescriptorResolverUtils.java b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/resolver/DescriptorResolverUtils.java
index 6a4e8186855..eb578cb028a 100644
--- a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/resolver/DescriptorResolverUtils.java
+++ b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/java/resolver/DescriptorResolverUtils.java
@@ -20,11 +20,8 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.descriptors.*;
 import org.jetbrains.jet.lang.descriptors.impl.TypeParameterDescriptorImpl;
-import org.jetbrains.jet.lang.resolve.DescriptorUtils;
 import org.jetbrains.jet.lang.resolve.OverridingUtil;
 import org.jetbrains.jet.lang.resolve.java.JvmAnnotationNames;
-import org.jetbrains.jet.lang.resolve.java.descriptor.JavaClassDescriptor;
-import org.jetbrains.jet.lang.resolve.java.descriptor.JavaPackageFragmentDescriptor;
 import org.jetbrains.jet.lang.resolve.java.sam.SingleAbstractMethodUtils;
 import org.jetbrains.jet.lang.resolve.java.structure.*;
 import org.jetbrains.jet.lang.resolve.name.FqName;
@@ -38,8 +35,6 @@ import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
 
 import java.util.*;
 
-import static org.jetbrains.jet.lang.resolve.DescriptorUtils.getFqNameSafe;
-
 public final class DescriptorResolverUtils {
     public static final FqName OBJECT_FQ_NAME = new FqName("java.lang.Object");
 
@@ -49,7 +44,7 @@ public final class DescriptorResolverUtils {
     public static boolean isCompiledKotlinPackageClass(@NotNull JavaClass javaClass) {
         if (javaClass.getOriginKind() == JavaClass.OriginKind.COMPILED) {
             return javaClass.findAnnotation(JvmAnnotationNames.KOTLIN_PACKAGE) != null
-                   || javaClass.findAnnotation(JvmAnnotationNames.KOTLIN_PACKAGE_FRAGMENT) != null;
+                   || javaClass.findAnnotation(JvmAnnotationNames.KOTLIN_PACKAGE_PART) != null;
         }
         return false;
     }
diff --git a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/KotlinClassHeader.java b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/KotlinClassHeader.java
index 86f36b370c6..b40f49ea5ef 100644
--- a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/KotlinClassHeader.java
+++ b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/KotlinClassHeader.java
@@ -24,7 +24,7 @@ public class KotlinClassHeader {
     public enum Kind {
         CLASS,
         PACKAGE_FACADE,
-        PACKAGE_FRAGMENT,
+        PACKAGE_PART,
         TRAIT_IMPL,
         INCOMPATIBLE_ABI_VERSION
     }
diff --git a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/ReadKotlinClassHeaderAnnotationVisitor.java b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/ReadKotlinClassHeaderAnnotationVisitor.java
index 984d777facb..63b72816cb9 100644
--- a/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/ReadKotlinClassHeaderAnnotationVisitor.java
+++ b/core/descriptor.loader.java/src/org/jetbrains/jet/lang/resolve/kotlin/header/ReadKotlinClassHeaderAnnotationVisitor.java
@@ -22,12 +22,10 @@ import org.jetbrains.jet.lang.resolve.java.AbiVersionUtil;
 import org.jetbrains.jet.lang.resolve.java.JvmAnnotationNames;
 import org.jetbrains.jet.lang.resolve.java.JvmClassName;
 import org.jetbrains.jet.lang.resolve.kotlin.KotlinJvmBinaryClass;
+import org.jetbrains.jet.lang.resolve.name.FqName;
 import org.jetbrains.jet.lang.resolve.name.Name;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
 import static org.jetbrains.jet.lang.resolve.java.AbiVersionUtil.isAbiVersionCompatible;
 import static org.jetbrains.jet.lang.resolve.java.JvmAnnotationNames.*;
@@ -41,12 +39,15 @@ public class ReadKotlinClassHeaderAnnotationVisitor implements AnnotationVisitor
     static {
         HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(KOTLIN_CLASS), CLASS);
         HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(KOTLIN_PACKAGE), PACKAGE_FACADE);
-        HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(KOTLIN_PACKAGE_FRAGMENT), PACKAGE_FRAGMENT);
+        HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(KOTLIN_PACKAGE_PART), PACKAGE_PART);
         HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(KOTLIN_TRAIT_IMPL), TRAIT_IMPL);
-        //noinspection deprecation
-        HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(OLD_JET_CLASS_ANNOTATION), INCOMPATIBLE_ABI_VERSION);
-        //noinspection deprecation
-        HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(OLD_JET_PACKAGE_CLASS_ANNOTATION), INCOMPATIBLE_ABI_VERSION);
+
+        @SuppressWarnings("deprecation")
+        List<FqName> incompatible = Arrays.asList(OLD_JET_CLASS_ANNOTATION, OLD_JET_PACKAGE_CLASS_ANNOTATION, OLD_KOTLIN_CLASS,
+                                                  OLD_KOTLIN_PACKAGE, OLD_KOTLIN_PACKAGE_FRAGMENT, OLD_KOTLIN_TRAIT_IMPL);
+        for (FqName fqName : incompatible) {
+            HEADER_KINDS.put(JvmClassName.byFqNameWithoutInnerClasses(fqName), INCOMPATIBLE_ABI_VERSION);
+        }
     }
 
     private int version = AbiVersionUtil.INVALID_VERSION;
@@ -99,7 +100,7 @@ public class ReadKotlinClassHeaderAnnotationVisitor implements AnnotationVisitor
         if (newKind == CLASS || newKind == PACKAGE_FACADE) {
             return kotlinClassOrPackageVisitor(annotationClassName);
         }
-        else if (newKind == PACKAGE_FRAGMENT || newKind == TRAIT_IMPL) {
+        else if (newKind == PACKAGE_PART || newKind == TRAIT_IMPL) {
             return annotationWithAbiVersionVisitor(annotationClassName);
         }
 
diff --git a/core/runtime.jvm/src/jet/KotlinClass.java b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinClass.java
similarity index 96%
rename from core/runtime.jvm/src/jet/KotlinClass.java
rename to core/runtime.jvm/src/kotlin/jvm/internal/KotlinClass.java
index 8780c1d77c6..2b954c18448 100644
--- a/core/runtime.jvm/src/jet/KotlinClass.java
+++ b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinClass.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package jet;
+package kotlin.jvm.internal;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
diff --git a/core/runtime.jvm/src/jet/KotlinPackage.java b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinPackage.java
similarity index 96%
rename from core/runtime.jvm/src/jet/KotlinPackage.java
rename to core/runtime.jvm/src/kotlin/jvm/internal/KotlinPackage.java
index c14818ffb5c..ff785e28ee5 100644
--- a/core/runtime.jvm/src/jet/KotlinPackage.java
+++ b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinPackage.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package jet;
+package kotlin.jvm.internal;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
diff --git a/core/runtime.jvm/src/jet/KotlinPackageFragment.java b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinPackagePart.java
similarity index 91%
rename from core/runtime.jvm/src/jet/KotlinPackageFragment.java
rename to core/runtime.jvm/src/kotlin/jvm/internal/KotlinPackagePart.java
index 0b5b0e17430..05b94f33dd4 100644
--- a/core/runtime.jvm/src/jet/KotlinPackageFragment.java
+++ b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinPackagePart.java
@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
-package jet;
+package kotlin.jvm.internal;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
 @Retention(RetentionPolicy.RUNTIME)
-public @interface KotlinPackageFragment {
+public @interface KotlinPackagePart {
     int abiVersion();
 }
diff --git a/core/runtime.jvm/src/jet/KotlinTraitImpl.java b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinTraitImpl.java
similarity index 96%
rename from core/runtime.jvm/src/jet/KotlinTraitImpl.java
rename to core/runtime.jvm/src/kotlin/jvm/internal/KotlinTraitImpl.java
index 1cfe75cb242..d90c1ff154c 100644
--- a/core/runtime.jvm/src/jet/KotlinTraitImpl.java
+++ b/core/runtime.jvm/src/kotlin/jvm/internal/KotlinTraitImpl.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package jet;
+package kotlin.jvm.internal;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
diff --git a/idea/src/org/jetbrains/jet/plugin/caches/JetFromJavaDescriptorHelper.java b/idea/src/org/jetbrains/jet/plugin/caches/JetFromJavaDescriptorHelper.java
index e3ed6f9cd80..83558e3909a 100644
--- a/idea/src/org/jetbrains/jet/plugin/caches/JetFromJavaDescriptorHelper.java
+++ b/idea/src/org/jetbrains/jet/plugin/caches/JetFromJavaDescriptorHelper.java
@@ -22,8 +22,6 @@ import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.*;
 import com.intellij.psi.impl.java.stubs.index.JavaAnnotationIndex;
 import com.intellij.psi.search.GlobalSearchScope;
-import jet.KotlinClass;
-import jet.KotlinPackage;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.descriptors.serialization.*;
@@ -54,7 +52,7 @@ public class JetFromJavaDescriptorHelper {
         /* Will iterate through short name caches
            Kotlin packages from jar a class files will be collected from java cache
            Kotlin package classes from sources will be collected with JetShortNamesCache.getClassesByName */
-        return getClassesByAnnotation(KotlinPackage.class.getSimpleName(), project, scope);
+        return getClassesByAnnotation("KotlinPackage", project, scope);
     }
 
     /**
@@ -77,14 +75,11 @@ public class JetFromJavaDescriptorHelper {
     static Collection<PsiClass> getCompiledClassesForTopLevelObjects(Project project, GlobalSearchScope scope) {
         Set<PsiClass> jetObjectClasses = Sets.newHashSet();
 
-        Collection<PsiClass> classesByAnnotation = getClassesByAnnotation(KotlinClass.class.getSimpleName(), project, scope);
+        Collection<PsiClass> classesByAnnotation = getClassesByAnnotation("KotlinClass", project, scope);
 
         for (PsiClass psiClass : classesByAnnotation) {
             ClassKind kind = getCompiledClassKind(psiClass);
-            if (kind == null) {
-                continue;
-            }
-            if (psiClass.getContainingClass() == null && kind == ClassKind.OBJECT) {
+            if (kind == ClassKind.OBJECT && psiClass.getContainingClass() == null) {
                 jetObjectClasses.add(psiClass);
             }
         }
@@ -174,7 +169,7 @@ public class JetFromJavaDescriptorHelper {
             boolean shouldBeExtension
     ) {
         Collection<FqName> result = Sets.newHashSet();
-        Collection<PsiClass> packageClasses = getClassesByAnnotation(KotlinPackage.class.getSimpleName(), project, scope);
+        Collection<PsiClass> packageClasses = getClassesByAnnotation("KotlinPackage", project, scope);
         for (PsiClass psiClass : packageClasses) {
             String qualifiedName = psiClass.getQualifiedName();
             if (qualifiedName == null) {
diff --git a/idea/src/org/jetbrains/jet/plugin/stubindex/builder/EmptyPackageFragmentClsStubBuilderFactory.java b/idea/src/org/jetbrains/jet/plugin/stubindex/builder/EmptyPackageFragmentClsStubBuilderFactory.java
index b91928a8af4..843e10d88ae 100644
--- a/idea/src/org/jetbrains/jet/plugin/stubindex/builder/EmptyPackageFragmentClsStubBuilderFactory.java
+++ b/idea/src/org/jetbrains/jet/plugin/stubindex/builder/EmptyPackageFragmentClsStubBuilderFactory.java
@@ -46,7 +46,7 @@ public class EmptyPackageFragmentClsStubBuilderFactory extends ClsStubBuilderFac
         if (file.getName().contains(PackageClassUtils.PACKAGE_CLASS_NAME_SUFFIX + "-") &&
             StdFileTypes.CLASS.getDefaultExtension().equals(file.getExtension())) {
             KotlinClassHeader header = new VirtualFileKotlinClass(LockBasedStorageManager.NO_LOCKS, file).getClassHeader();
-            return header != null && header.getKind() == KotlinClassHeader.Kind.PACKAGE_FRAGMENT;
+            return header != null && header.getKind() == KotlinClassHeader.Kind.PACKAGE_PART;
         }
         return false;
     }
diff --git a/idea/src/org/jetbrains/jet/plugin/versions/KotlinAbiVersionIndex.java b/idea/src/org/jetbrains/jet/plugin/versions/KotlinAbiVersionIndex.java
index 8cff8817a95..0b635b49096 100644
--- a/idea/src/org/jetbrains/jet/plugin/versions/KotlinAbiVersionIndex.java
+++ b/idea/src/org/jetbrains/jet/plugin/versions/KotlinAbiVersionIndex.java
@@ -63,6 +63,8 @@ public class KotlinAbiVersionIndex extends ScalarIndexExtension<Integer> {
         private final Set<String> kotlinAnnotationsDesc = new ImmutableSet.Builder<String>()
                 .add(asmDescByFqNameWithoutInnerClasses(OLD_JET_CLASS_ANNOTATION))
                 .add(asmDescByFqNameWithoutInnerClasses(OLD_JET_PACKAGE_CLASS_ANNOTATION))
+                .add(asmDescByFqNameWithoutInnerClasses(OLD_KOTLIN_CLASS))
+                .add(asmDescByFqNameWithoutInnerClasses(OLD_KOTLIN_PACKAGE))
                 .add(asmDescByFqNameWithoutInnerClasses(KOTLIN_CLASS))
                 .add(asmDescByFqNameWithoutInnerClasses(KOTLIN_PACKAGE))
                 .build();