diff --git a/llvm/include/llvm/CodeGen/MachineInstr.h b/llvm/include/llvm/CodeGen/MachineInstr.h
index a205792e4771..09e9ad6387e5 100644
--- a/llvm/include/llvm/CodeGen/MachineInstr.h
+++ b/llvm/include/llvm/CodeGen/MachineInstr.h
@@ -295,6 +295,7 @@ public:
   void addImmOperand(int64_t Val) {
     MachineOperand &Op = AddNewOperand();
     Op.opType = MachineOperand::MO_Immediate;
+    Op.IsDef = false;
     Op.contents.immedVal = Val;
     Op.offset = 0;
   }
@@ -302,6 +303,7 @@ public:
   void addMachineBasicBlockOperand(MachineBasicBlock *MBB) {
     MachineOperand &Op = AddNewOperand();
     Op.opType = MachineOperand::MO_MachineBasicBlock;
+    Op.IsDef = false;
     Op.contents.MBB = MBB;
     Op.offset = 0;
   }
@@ -311,6 +313,7 @@ public:
   void addFrameIndexOperand(unsigned Idx) {
     MachineOperand &Op = AddNewOperand();
     Op.opType = MachineOperand::MO_FrameIndex;
+    Op.IsDef = false;
     Op.contents.immedVal = Idx;
     Op.offset = 0;
   }
@@ -321,6 +324,7 @@ public:
   void addConstantPoolIndexOperand(unsigned Idx, int Offset) {
     MachineOperand &Op = AddNewOperand();
     Op.opType = MachineOperand::MO_ConstantPoolIndex;
+    Op.IsDef = false;
     Op.contents.immedVal = Idx;
     Op.offset = Offset;
   }
@@ -331,6 +335,7 @@ public:
   void addJumpTableIndexOperand(unsigned Idx) {
     MachineOperand &Op = AddNewOperand();
     Op.opType = MachineOperand::MO_JumpTableIndex;
+    Op.IsDef = false;
     Op.contents.immedVal = Idx;
     Op.offset = 0;
   }
@@ -338,6 +343,7 @@ public:
   void addGlobalAddressOperand(GlobalValue *GV, int Offset) {
     MachineOperand &Op = AddNewOperand();
     Op.opType = MachineOperand::MO_GlobalAddress;
+    Op.IsDef = false;
     Op.contents.GV = GV;
     Op.offset = Offset;
   }
@@ -347,6 +353,7 @@ public:
   void addExternalSymbolOperand(const char *SymName) {
     MachineOperand &Op = AddNewOperand();
     Op.opType = MachineOperand::MO_ExternalSymbol;
+    Op.IsDef = false;
     Op.contents.SymbolName = SymName;
     Op.offset = 0;
   }