diff --git a/include/llvm/Analysis/DataStructure/DSGraph.h b/include/llvm/Analysis/DataStructure/DSGraph.h
index a7ac6663eb4..a0d06add3b9 100644
--- a/include/llvm/Analysis/DataStructure/DSGraph.h
+++ b/include/llvm/Analysis/DataStructure/DSGraph.h
@@ -454,7 +454,7 @@ public:
   ///
   /// The CloneFlags member controls various aspects of the cloning process.
   ///
-  void cloneInto(const DSGraph &G, ScalarMapTy &OldValMap,
+  void cloneInto(const DSGraph &G,
                  ReturnNodesTy &OldReturnNodes, NodeMapTy &OldNodeMap,
                  unsigned CloneFlags = 0);