diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp
index ec49058407f..6fdc08670f1 100644
--- a/lib/MC/MCAsmStreamer.cpp
+++ b/lib/MC/MCAsmStreamer.cpp
@@ -79,7 +79,7 @@ public:
     EmitCommentsAndEOL();
   }
 
-  virtual void EmitSyntaxDirective();
+  void EmitSyntaxDirective() override;
 
   void EmitCommentsAndEOL();