diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index 90d95c040ec..ef73c00100f 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -1,4 +1,4 @@
-//===-- SelectionDAGBuilder.h - Selection-DAG building --------------------===//
+//===-- SelectionDAGBuilder.h - Selection-DAG building --------*- c++ -*---===//
 //
 //                     The LLVM Compiler Infrastructure
 //