diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 95aa445..c777949 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2699,7 +2699,7 @@
                                            TLI.getPointerTy()));
 
       VAList = DAG.getNode(ISD::AND, dl, TLI.getPointerTy(), VAList,
-                           DAG.getConstant(-Align,
+                           DAG.getConstant(-(int64_t)Align,
                                            TLI.getPointerTy()));
     }