diff --git a/include/llvm/Support/Streams.h b/include/llvm/Support/Streams.h
index 12000227242..46bac8baaf6 100644
--- a/include/llvm/Support/Streams.h
+++ b/include/llvm/Support/Streams.h
@@ -46,7 +46,7 @@ namespace llvm {
     }
 
     template <typename Ty>
-    BaseStream &operator >> (const Ty &Thing) {
+    BaseStream &operator >> (Ty &Thing) {
       if (Stream) *Stream >> Thing;
       return *this;
     }