diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 52a90960ec5..3ab98e1bf57 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -904,9 +904,9 @@ MachineInstr* MachineInstr::getBundleStart() {
   if (!isInsideBundle())
     return this;
   MachineBasicBlock::reverse_instr_iterator MII(this);
-  --MII;
+  ++MII;
   while (MII->isInsideBundle())
-    --MII;
+    ++MII;
   return &*MII;
 }