diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index abffeb0..b70bfea 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3915,7 +3915,7 @@
 /// At the end of instruction selection, they will be inserted to the entry BB.
 bool
 SelectionDAGBuilder::EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
-                                              uint64_t Offset,
+                                              int64_t Offset, 
                                               const SDValue &N) {
   if (!isa<Argument>(V))
     return false;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index 6843844..5f400e9 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -529,7 +529,7 @@
   /// corresponding DBG_VALUE machine instruction for it now. At the end of 
   /// instruction selection, they will be inserted to the entry BB.
   bool EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
-                                uint64_t Offset, const SDValue &N);
+                                int64_t Offset, const SDValue &N);
 };
 
 } // end namespace llvm