diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
index 64692ba37ae1..1f61e3fccc2c 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -385,7 +385,7 @@ public:
   }
 
   // isTLSSupported - Whether the target supports thread-local storage
-  unsigned isTLSSupported() const {
+  bool isTLSSupported() const {
     return TLSSupported;
   }