diff --git a/llvm/include/llvm/Analysis/LoopNestAnalysis.h b/llvm/include/llvm/Analysis/LoopNestAnalysis.h
index 9a749a1c8eae19..e045419f8d537d 100644
--- a/llvm/include/llvm/Analysis/LoopNestAnalysis.h
+++ b/llvm/include/llvm/Analysis/LoopNestAnalysis.h
@@ -30,6 +30,7 @@ class LoopNest {
   LoopNest(Loop &Root, ScalarEvolution &SE);
 
   LoopNest() = delete;
+  LoopNest &operator=(const LoopNest &) = delete;
 
   /// Construct a LoopNest object.
   static std::unique_ptr<LoopNest> getLoopNest(Loop &Root, ScalarEvolution &SE);