diff --git a/include/llvm/Analysis/MemorySSA.h b/include/llvm/Analysis/MemorySSA.h
index 7b6ad79..17e2d0c 100644
--- a/include/llvm/Analysis/MemorySSA.h
+++ b/include/llvm/Analysis/MemorySSA.h
@@ -404,6 +404,7 @@
 
   void resetOptimized() {
     OptimizedID = INVALID_MEMORYACCESS_ID;
+    setOperand(1, nullptr);
   }
 
   void print(raw_ostream &OS) const;