diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProvider.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProvider.java
index cc7dddbdb1f..5fa3f8b4b8a 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProvider.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProvider.java
@@ -40,6 +40,4 @@ public interface DeclarationProvider {
 
     @Nullable
     JetClassOrObject getClassOrObjectDeclaration(@NotNull Name name);
-
-    boolean isPackageDeclared(@NotNull Name name);
 }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProviderFactory.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProviderFactory.java
index 28b73f9b108..542011408e4 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProviderFactory.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/DeclarationProviderFactory.java
@@ -29,5 +29,5 @@ public interface DeclarationProviderFactory {
     ClassMemberDeclarationProvider getClassMemberDeclarationProvider(@NotNull JetClassOrObject jetClassOrObject);
 
     @Nullable
-    DeclarationProvider getPackageMemberDeclarationProvider(@NotNull FqName packageFqName);
+    PackageMemberDeclarationProvider getPackageMemberDeclarationProvider(@NotNull FqName packageFqName);
 }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedDeclarationProviderFactory.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedDeclarationProviderFactory.java
index 4bf807bc438..252d7119114 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedDeclarationProviderFactory.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedDeclarationProviderFactory.java
@@ -39,7 +39,7 @@ public class FileBasedDeclarationProviderFactory implements DeclarationProviderF
 
     private final Multimap<FqName, JetFile> filesByPackage = HashMultimap.create();
     private final Set<FqName> definedPackages = Sets.newHashSet();
-    private final Map<FqName, DeclarationProvider> packageDeclarationProviders = Maps.newHashMap();
+    private final Map<FqName, PackageMemberDeclarationProvider> packageDeclarationProviders = Maps.newHashMap();
     private final Map<JetClassOrObject, ClassMemberDeclarationProvider> classMemberDeclarationProviders = Maps.newHashMap();
 
     private boolean indexed = false;
@@ -77,10 +77,10 @@ public class FileBasedDeclarationProviderFactory implements DeclarationProviderF
     }
 
     @Override
-    public DeclarationProvider getPackageMemberDeclarationProvider(@NotNull FqName packageFqName) {
+    public PackageMemberDeclarationProvider getPackageMemberDeclarationProvider(@NotNull FqName packageFqName) {
         createIndex();
 
-        DeclarationProvider declarationProvider = packageDeclarationProviders.get(packageFqName);
+        PackageMemberDeclarationProvider declarationProvider = packageDeclarationProviders.get(packageFqName);
         if (declarationProvider != null) {
             return declarationProvider;
         }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedPackageMemberDeclarationProvider.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedPackageMemberDeclarationProvider.java
index c06ff1cac10..8e9490037d4 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedPackageMemberDeclarationProvider.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/FileBasedPackageMemberDeclarationProvider.java
@@ -26,7 +26,7 @@ import java.util.Collection;
 /**
  * @author abreslav
  */
-public class FileBasedPackageMemberDeclarationProvider extends AbstractPsiBasedDeclarationProvider {
+public class FileBasedPackageMemberDeclarationProvider extends AbstractPsiBasedDeclarationProvider implements PackageMemberDeclarationProvider {
 
     private final FqName fqName;
     private final FileBasedDeclarationProviderFactory factory;
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageDescriptor.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageDescriptor.java
index 57ca156042b..1feca67dc50 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageDescriptor.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageDescriptor.java
@@ -38,7 +38,7 @@ public class LazyPackageDescriptor extends AbstractNamespaceDescriptorImpl imple
             @NotNull NamespaceDescriptorParent containingDeclaration,
             @NotNull Name name,
             @NotNull ResolveSession resolveSession,
-            @NotNull DeclarationProvider declarationProvider
+            @NotNull PackageMemberDeclarationProvider declarationProvider
     ) {
         super(containingDeclaration, Collections.<AnnotationDescriptor>emptyList(), name);
         this.memberScope = new LazyPackageMemberScope(resolveSession, declarationProvider, this);
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageMemberScope.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageMemberScope.java
index b3c32c3eef8..f7a180a7621 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageMemberScope.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/LazyPackageMemberScope.java
@@ -34,12 +34,12 @@ import java.util.Set;
 /**
 * @author abreslav
 */
-public class LazyPackageMemberScope extends AbstractLazyMemberScope<NamespaceDescriptor, DeclarationProvider> {
+public class LazyPackageMemberScope extends AbstractLazyMemberScope<NamespaceDescriptor, PackageMemberDeclarationProvider> {
 
     private final Map<Name, NamespaceDescriptor> packageDescriptors = Maps.newHashMap();
 
     public LazyPackageMemberScope(@NotNull ResolveSession resolveSession,
-            @NotNull DeclarationProvider declarationProvider,
+            @NotNull PackageMemberDeclarationProvider declarationProvider,
             @NotNull NamespaceDescriptor thisPackage) {
         super(resolveSession, declarationProvider, thisPackage);
     }
@@ -52,7 +52,7 @@ public class LazyPackageMemberScope extends AbstractLazyMemberScope<NamespaceDes
 
         if (!declarationProvider.isPackageDeclared(name)) return null;
 
-        DeclarationProvider packageMemberDeclarationProvider = resolveSession.getDeclarationProviderFactory().getPackageMemberDeclarationProvider(
+        PackageMemberDeclarationProvider packageMemberDeclarationProvider = resolveSession.getDeclarationProviderFactory().getPackageMemberDeclarationProvider(
                 DescriptorUtils.getFQName(thisDescriptor).child(name).toSafe());
         assert packageMemberDeclarationProvider != null : "Package is declared, but declaration provider is not found: " + name;
         NamespaceDescriptor namespaceDescriptor = new LazyPackageDescriptor(thisDescriptor, name, resolveSession, packageMemberDeclarationProvider);
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/PackageMemberDeclarationProvider.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/PackageMemberDeclarationProvider.java
new file mode 100644
index 00000000000..0283c20890d
--- /dev/null
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/PackageMemberDeclarationProvider.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2010-2012 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.lang.resolve.lazy;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.lang.resolve.name.Name;
+
+/**
+ * @author abreslav
+ */
+public interface PackageMemberDeclarationProvider extends DeclarationProvider {
+
+    boolean isPackageDeclared(@NotNull Name name);
+}
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/PsiBasedClassMemberDeclarationProvider.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/PsiBasedClassMemberDeclarationProvider.java
index a77fb923507..e6b42cb1ef9 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/PsiBasedClassMemberDeclarationProvider.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/PsiBasedClassMemberDeclarationProvider.java
@@ -20,7 +20,6 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.psi.JetClassObject;
 import org.jetbrains.jet.lang.psi.JetClassOrObject;
 import org.jetbrains.jet.lang.psi.JetDeclaration;
-import org.jetbrains.jet.lang.resolve.name.Name;
 
 /**
  * @author abreslav
@@ -57,9 +56,4 @@ public class PsiBasedClassMemberDeclarationProvider extends AbstractPsiBasedDecl
         createIndex();
         return jetClassObject;
     }
-
-    @Override
-    public boolean isPackageDeclared(@NotNull Name name) {
-        throw new UnsupportedOperationException("Shouldn't be called on a ClassMemberDeclarationProvider");
-    }
 }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/ResolveSession.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/ResolveSession.java
index a3caea2a31b..0e57c7ef523 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/ResolveSession.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/ResolveSession.java
@@ -59,7 +59,7 @@ public class ResolveSession {
     ) {
         this.injector = new InjectorForLazyResolve(project, this, trace);
         this.module = rootDescriptor;
-        DeclarationProvider provider = declarationProviderFactory.getPackageMemberDeclarationProvider(FqName.ROOT);
+        PackageMemberDeclarationProvider provider = declarationProviderFactory.getPackageMemberDeclarationProvider(FqName.ROOT);
         assert provider != null : "No declaration provider for root package in " + rootDescriptor;
         this.rootPackage = new LazyPackageDescriptor(rootDescriptor, FqNameUnsafe.ROOT_NAME, this, provider);
         rootDescriptor.setRootNamespace(rootPackage);