diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp
index ee8da67..5b09519 100644
--- a/lib/CodeGen/MachineBasicBlock.cpp
+++ b/lib/CodeGen/MachineBasicBlock.cpp
@@ -47,7 +47,7 @@
 
 
 MachineInstr* ilist_traits<MachineInstr>::createSentinel() {
-  MachineInstr* dummy = new MachineInstr(0, 0);
+  MachineInstr* dummy = new MachineInstr(0, 0, true, true);
   LeakDetector::removeGarbageObject(dummy);
   return dummy;
 }