diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index 4dfd7f77826d76dcb2aa1eeae51ab78443b4fad1..51d88ff3b85c3d262f5f70c33b5c79b28f6a912b 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -106,7 +106,7 @@ void ilist_traits<MachineBasicBlock>::transferNodesFromList(
 
 MachineFunction::MachineFunction(const Function *F,
                                  const TargetMachine &TM)
-  : Annotation(MF_AID), Fn(F), Target(TM), NextMBBNumber(0) {
+  : Annotation(MF_AID), Fn(F), Target(TM) {
   SSARegMapping = new SSARegMap();
   MFInfo = new MachineFunctionInfo(*this);
   FrameInfo = new MachineFrameInfo();