1 files changed, 2 insertions, 1 deletions
diff --git a/tools/llvm-diff/DiffConsumer.h b/tools/llvm-diff/DiffConsumer.h
index 855f6884e65b..82f5ce598b44 100644
--- a/tools/llvm-diff/DiffConsumer.h
+++ b/tools/llvm-diff/DiffConsumer.h
@@ -17,11 +17,12 @@
 #include "DiffLog.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringRef.h"
+#include "llvm/IR/Value.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace llvm {
+class StringRef;
   class Module;
   class Value;
   class Function;