diff --git a/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java b/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java
index 134b0799d18d..ff4dff4a05e2 100644
--- a/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java
+++ b/platform/core-impl/src/com/intellij/psi/impl/source/PsiFileImpl.java
@@ -618,7 +618,7 @@ public abstract class PsiFileImpl extends ElementBase implements PsiFileEx, PsiF
       }
       final PsiFileStub[] stubRoots = baseRoot.getStubRoots();
       if (stubRoots.length != roots.size()) {
-        final Function<PsiFileStub, String> stubToString = stub -> stub.getClass().getSimpleName();
+        final Function<PsiFileStub, String> stubToString = stub -> "{" + stub.getClass().getSimpleName() + " " + stub.getType().getLanguage() + "}";
         LOG.error("readOrBuilt roots = " + StringUtil.join(stubRoots, stubToString, ", ") + "; " +
                   StubTreeLoader.getFileViewProviderMismatchDiagnostics(viewProvider));
         rebuildStub();