diff --git a/lib/CodeGen/ShadowStackGC.cpp b/lib/CodeGen/ShadowStackGC.cpp
index 10d0109..6ba1243 100644
--- a/lib/CodeGen/ShadowStackGC.cpp
+++ b/lib/CodeGen/ShadowStackGC.cpp
@@ -93,7 +93,7 @@
 
   public:
     EscapeEnumerator(Function &F, const char *N = "cleanup")
-      : F(F), CleanupBBName(N), State(0) {}
+      : F(F), CleanupBBName(N), State(0), Builder(*F.getContext()) {}
 
     IRBuilder<> *Next() {
       switch (State) {