1 files changed, 4 insertions, 0 deletions
diff --git a/include/clang/AST/CommentVisitor.h b/include/clang/AST/CommentVisitor.h
index 47867a6..21641bf 100644
--- a/include/clang/AST/CommentVisitor.h
+++ b/include/clang/AST/CommentVisitor.h
@@ -7,6 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_CLANG_AST_COMMENTVISITOR_H
+#define LLVM_CLANG_AST_COMMENTVISITOR_H
+
 #include "clang/AST/Comment.h"
 #include "llvm/Support/ErrorHandling.h"
 
@@ -64,3 +67,4 @@ class ConstCommentVisitor :
 } // end namespace comments
 } // end namespace clang
 
+#endif