diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
index c7d6b69fb786..04d89437d32c 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -218,7 +218,7 @@ public:
     CI_None = 0x00,
     CI_AllowsMemory = 0x01,
     CI_AllowsRegister = 0x02,
-    CI_ReadWrite = 0x03
+    CI_ReadWrite = 0x04
   };
 
   // validateOutputConstraint, validateInputConstraint - Checks that