diff --git a/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AbiVersionUtil.java b/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AbiVersionUtil.java
index f1535f68d2f..8772d9474a8 100644
--- a/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AbiVersionUtil.java
+++ b/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AbiVersionUtil.java
@@ -27,6 +27,7 @@ import org.jetbrains.jet.util.slicedmap.WritableSlice;
 public class AbiVersionUtil {
     public static final WritableSlice<PsiClass, Integer> ABI_VERSION_ERRORS =
             new BasicWritableSlice<PsiClass, Integer>(Slices.ONLY_REWRITE_TO_EQUAL, true);
+    public static final int INVALID_VERSION = -1;
 
     public static boolean isAbiVersionCompatible(int abiVersion) {
         return abiVersion == JvmAbi.VERSION;
diff --git a/idea/src/META-INF/plugin.xml b/idea/src/META-INF/plugin.xml
index 2824b4423d5..9934e6e965f 100644
--- a/idea/src/META-INF/plugin.xml
+++ b/idea/src/META-INF/plugin.xml
@@ -215,6 +215,8 @@
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetAnnotationsIndex" />
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetTopLevelShortObjectNameIndex" />
 
+      <fileBasedIndex implementation="org.jetbrains.jet.plugin.versions.KotlinAbiVersionIndex"/>
+
       <contentBasedClassFileProcessor implementation="org.jetbrains.jet.plugin.libraries.JetContentBasedFileSubstitutor" />
       <psi.clsCustomNavigationPolicy implementation="org.jetbrains.jet.plugin.libraries.JetClsNavigationPolicy" />
       <psi.clsDecompiledFileProvider implementation="org.jetbrains.jet.plugin.libraries.JetClsFileDecompiledPsiFileProvider" />
diff --git a/idea/src/org/jetbrains/jet/plugin/versions/KotlinAbiVersionIndex.java b/idea/src/org/jetbrains/jet/plugin/versions/KotlinAbiVersionIndex.java
new file mode 100644
index 00000000000..e44dd71793e
--- /dev/null
+++ b/idea/src/org/jetbrains/jet/plugin/versions/KotlinAbiVersionIndex.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.plugin.versions;
+
+import com.google.common.collect.Maps;
+import com.intellij.openapi.fileTypes.StdFileTypes;
+import com.intellij.openapi.util.Ref;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.indexing.*;
+import com.intellij.util.io.ExternalIntegerKeyDescriptor;
+import com.intellij.util.io.KeyDescriptor;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.asm4.AnnotationVisitor;
+import org.jetbrains.asm4.ClassReader;
+import org.jetbrains.asm4.ClassVisitor;
+import org.jetbrains.asm4.Opcodes;
+import org.jetbrains.jet.lang.resolve.java.AbiVersionUtil;
+import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
+
+import java.util.Map;
+
+/**
+ * Important! This is not a stub-based index. And it has its own version
+ */
+public class KotlinAbiVersionIndex extends ScalarIndexExtension<Integer> {
+
+    public static final KotlinAbiVersionIndex INSTANCE = new KotlinAbiVersionIndex();
+
+    private static final int VERSION = 0;
+
+    private static final ID<Integer, Void> NAME = ID.create(KotlinAbiVersionIndex.class.getCanonicalName());
+    private static final ExternalIntegerKeyDescriptor KEY_DESCRIPTOR = new ExternalIntegerKeyDescriptor();
+
+    private static final FileBasedIndex.InputFilter INPUT_FILTER = new FileBasedIndex.InputFilter() {
+        @Override
+        public boolean acceptInput(VirtualFile file) {
+            return file.getFileType() == StdFileTypes.CLASS;
+        }
+    };
+    private static final DataIndexer<Integer, Void, FileContent> INDEXER = new DataIndexer<Integer, Void, FileContent>() {
+        @NotNull
+        @Override
+        public Map<Integer, Void> map(FileContent inputData) {
+            final Map<Integer, Void> result = Maps.newHashMap();
+            final Ref<Boolean> annotationPresent = new Ref<Boolean>(false);
+
+            ClassReader classReader = new ClassReader(inputData.getContent());
+            classReader.accept(new ClassVisitor(Opcodes.ASM4) {
+                @Override
+                public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
+                    if (!JvmStdlibNames.JET_CLASS.getDescriptor().equals(desc) &&
+                        !JvmStdlibNames.JET_PACKAGE_CLASS.getDescriptor().equals(desc)) {
+                        return null;
+                    }
+                    annotationPresent.set(true);
+                    return new AnnotationVisitor(Opcodes.ASM4) {
+                        @Override
+                        public void visit(String name, Object value) {
+                            if (JvmStdlibNames.ABI_VERSION_NAME.equals(name)) {
+                                if (value instanceof Integer) {
+                                    Integer abiVersion = (Integer) value;
+                                    result.put(abiVersion, null);
+                                }
+                                else {
+                                    // Version is set to something weird
+                                    result.put(AbiVersionUtil.INVALID_VERSION, null);
+                                }
+                            }
+                        }
+                    };
+                }
+            }, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
+
+            if (annotationPresent.get() && result.isEmpty()) {
+                // No version at all: the class is too old
+                result.put(AbiVersionUtil.INVALID_VERSION, null);
+            }
+
+            return result;
+        }
+    };
+
+    private KotlinAbiVersionIndex() {}
+
+    @NotNull
+    @Override
+    public ID<Integer, Void> getName() {
+        return NAME;
+    }
+
+    @NotNull
+    @Override
+    public DataIndexer<Integer, Void, FileContent> getIndexer() {
+        return INDEXER;
+    }
+
+    @Override
+    public KeyDescriptor<Integer> getKeyDescriptor() {
+        return KEY_DESCRIPTOR;
+    }
+
+    @Override
+    public FileBasedIndex.InputFilter getInputFilter() {
+        return INPUT_FILTER;
+    }
+
+    @Override
+    public boolean dependsOnFileContent() {
+        return true;
+    }
+
+    @Override
+    public int getVersion() {
+        return VERSION;
+    }
+}