diff --git a/clang/lib/Sema/SemaStmt.cpp b/clang/lib/Sema/SemaStmt.cpp
index 6bdc71b..1b6aed6 100644
--- a/clang/lib/Sema/SemaStmt.cpp
+++ b/clang/lib/Sema/SemaStmt.cpp
@@ -753,6 +753,12 @@
   if (!CondEnumType || !CaseEnumType)
     return;
 
+  // Ignore anonymous enums.
+  if (!CondEnumType->getDecl()->getIdentifier())
+    return;
+  if (!CaseEnumType->getDecl()->getIdentifier())
+    return;
+
   if (S.Context.hasSameUnqualifiedType(CondType, CaseType))
     return;