diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
index 2673eba..06cf053 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
@@ -642,8 +642,10 @@
             // Insert to start of the BB (after PHIs).
             BB->insert(BBBegin, DbgMI);
           else {
+            // Insert at the instruction, which may be in a different
+            // block, if the block was split by a custom inserter.
             MachineBasicBlock::iterator Pos = MI;
-            BB->insert(llvm::next(Pos), DbgMI);
+            MI->getParent()->insert(llvm::next(Pos), DbgMI);
           }
         }
       }