diff --git a/llvm/include/llvm/Transforms/Utils/DebugSSAUpdater.h b/llvm/include/llvm/Transforms/Utils/DebugSSAUpdater.h
index 90899c86f5c3b..2d25ce3245793 100644
--- a/llvm/include/llvm/Transforms/Utils/DebugSSAUpdater.h
+++ b/llvm/include/llvm/Transforms/Utils/DebugSSAUpdater.h
@@ -235,6 +235,11 @@ class DebugSSAUpdater {
   DebugSSAUpdater(const DebugSSAUpdater &) = delete;
   DebugSSAUpdater &operator=(const DebugSSAUpdater &) = delete;
 
+  ~DebugSSAUpdater() {
+    for (auto &Block : BlockMap)
+      delete Block.second;
+  }
+
   void reset() {
     for (auto &Block : BlockMap)
       delete Block.second;