diff --git a/idea/src/org/jetbrains/jet/plugin/libraries/DecompiledUtils.kt b/idea/src/org/jetbrains/jet/plugin/libraries/DecompiledUtils.kt
index 5a1050773a6..426f7538cf8 100644
--- a/idea/src/org/jetbrains/jet/plugin/libraries/DecompiledUtils.kt
+++ b/idea/src/org/jetbrains/jet/plugin/libraries/DecompiledUtils.kt
@@ -58,5 +58,5 @@ public fun isKotlinInternalCompiledFile(file: VirtualFile): Boolean {
         return true
     }
     val header = KotlinBinaryClassCache.getKotlinBinaryClass(file).getClassHeader()
-    return header != null && header.getKind() == KotlinClassHeader.Kind.PACKAGE_FRAGMENT
+    return header != null && header.getKind() == KotlinClassHeader.Kind.PACKAGE_PART
 }
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