diff --git a/lib/CodeGen/CodeGen.cpp b/lib/CodeGen/CodeGen.cpp
index 6548713..2c7a427 100644
--- a/lib/CodeGen/CodeGen.cpp
+++ b/lib/CodeGen/CodeGen.cpp
@@ -65,6 +65,7 @@
   initializeUnreachableBlockElimPass(Registry);
   initializeUnreachableMachineBlockElimPass(Registry);
   initializeVirtRegMapPass(Registry);
+  initializeVirtRegRewriterPass(Registry);
   initializeLowerIntrinsicsPass(Registry);
   initializeMachineFunctionPrinterPassPass(Registry);
 }