diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/Visibilities.java b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/Visibilities.java
index d98006a2c68..28be6fac800 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/Visibilities.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/descriptors/Visibilities.java
@@ -66,10 +66,7 @@ public class Visibilities {
     public static final Visibility INTERNAL = new Visibility("internal", false) {
         @Override
         protected boolean isVisible(@NotNull DeclarationDescriptorWithVisibility what, @NotNull DeclarationDescriptor from) {
-            ModuleDescriptor parentModule = DescriptorUtils.getParentOfType(what, ModuleDescriptor.class, false);
-            ModuleDescriptor fromModule = DescriptorUtils.getParentOfType(from, ModuleDescriptor.class, false);
-            assert parentModule != null && fromModule != null;
-            return parentModule.equals(fromModule);
+            return DescriptorUtils.isInSameModule(what, from);
         }
     };
 
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java
index 160cfa2c417..29650438ea0 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java
@@ -144,6 +144,13 @@ public class DescriptorUtils {
         return fromPackage != null && whatPackage != null && whatPackage.equals(fromPackage);
     }
 
+    public static boolean isInSameModule(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second) {
+        ModuleDescriptor parentModule = DescriptorUtils.getParentOfType(first, ModuleDescriptor.class, false);
+        ModuleDescriptor fromModule = DescriptorUtils.getParentOfType(second, ModuleDescriptor.class, false);
+        assert parentModule != null && fromModule != null;
+        return parentModule.equals(fromModule);
+    }
+
     @Nullable
     public static DeclarationDescriptor findTopLevelParent(@NotNull DeclarationDescriptor declarationDescriptor) {
         DeclarationDescriptor descriptor = declarationDescriptor;