diff --git a/platform/core-impl/src/com/intellij/psi/stubs/StubTree.java b/platform/core-impl/src/com/intellij/psi/stubs/StubTree.java
index 7ad83b011c6c..5b2e09102b03 100644
--- a/platform/core-impl/src/com/intellij/psi/stubs/StubTree.java
+++ b/platform/core-impl/src/com/intellij/psi/stubs/StubTree.java
@@ -43,8 +43,8 @@ public class StubTree extends ObjectStubTree<StubElement<?>> {
     if (roots.length == 1) return super.getPlainListFromAllRoots();
 
     return ContainerUtil.concat(roots, stub -> {
-      final ObjectStubTree existingTree = stub.getUserData(STUB_TO_TREE_REFERENCE);
-      //noinspection unchecked
+      @SuppressWarnings("unchecked")
+      final ObjectStubTree<StubElement<?>> existingTree = stub.getUserData(STUB_TO_TREE_REFERENCE);
       return existingTree != null ? existingTree.getPlainList() : new StubTree(stub, false).getPlainList();
     });
   }