diff --git a/llvm/lib/Analysis/MemorySSA.cpp b/llvm/lib/Analysis/MemorySSA.cpp
index fc9de56a5e5b..f63898be3173 100644
--- a/llvm/lib/Analysis/MemorySSA.cpp
+++ b/llvm/lib/Analysis/MemorySSA.cpp
@@ -130,6 +130,12 @@ public:
   MemorySSAWalkerAnnotatedWriter(MemorySSA *M)
       : MSSA(M), Walker(M->getWalker()) {}
 
+  void emitBasicBlockStartAnnot(const BasicBlock *BB,
+                                formatted_raw_ostream &OS) override {
+    if (MemoryAccess *MA = MSSA->getMemoryAccess(BB))
+      OS << "; " << *MA << "\n";
+  }
+
   void emitInstructionAnnot(const Instruction *I,
                             formatted_raw_ostream &OS) override {
     if (MemoryAccess *MA = MSSA->getMemoryAccess(I)) {