diff --git a/include/llvm/MC/MCInst.h b/include/llvm/MC/MCInst.h
index b204a9b74da..10a896a6688 100644
--- a/include/llvm/MC/MCInst.h
+++ b/include/llvm/MC/MCInst.h
@@ -132,7 +132,7 @@ class MCInst {
   unsigned Opcode;
   SmallVector<MCOperand, 8> Operands;
 public:
-  MCInst() : Opcode(~0U) {}
+  MCInst() : Opcode(0) {}
   
   void setOpcode(unsigned Op) { Opcode = Op; }