1 files changed, 1 insertions, 1 deletions
diff --git a/clang/include/clang/Basic/Diagnostic.h b/clang/include/clang/Basic/Diagnostic.h
index ebc044ce880..1e2e5e06b0e 100644
--- a/clang/include/clang/Basic/Diagnostic.h
+++ b/clang/include/clang/Basic/Diagnostic.h
@@ -16,6 +16,7 @@
 #define LLVM_CLANG_DIAGNOSTIC_H
 
 #include "clang/Basic/DiagnosticIDs.h"
+#include "clang/Basic/DiagnosticOptions.h"
 #include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
@@ -32,7 +33,6 @@ namespace clang {
   class DiagnosticOptions;
   class IdentifierInfo;
   class LangOptions;
-  enum OverloadsShown : unsigned;
   class Preprocessor;
   class StoredDiagnostic;
   namespace tok {