diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 9b7808e..d43ac19 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -1407,7 +1407,7 @@
       
       MVT::ValueType SVT = cast<VTSDNode>(Node->getOperand(1))->getVT();
       SDOperand TruncOp = SDOperand(getTruncate(N0, SVT), 0);
-      unsigned Opc;
+      unsigned Opc = 0;
       switch (NVT) {
       case MVT::i16:
         if (SVT == MVT::i8) Opc = X86::MOVSX16rr8;