diff --git a/src/compiler/IntermediateRep.cc b/src/compiler/IntermediateRep.cc
index 237f5e0..031d3d3 100644
--- a/src/compiler/IntermediateRep.cc
+++ b/src/compiler/IntermediateRep.cc
@@ -77,6 +77,7 @@
   oatInitGrowableList(cUnit, bb->predecessors,
                       (blockType == kExitBlock) ? 2048 : 2,
                       kListPredecessors);
+  cUnit->blockIdMap.Put(blockId, blockId);
   return bb;
 }