diff --git a/include/llvm/ADT/DenseMap.h b/include/llvm/ADT/DenseMap.h
index 948a6e6bfb3..50c0bf1c3d5 100644
--- a/include/llvm/ADT/DenseMap.h
+++ b/include/llvm/ADT/DenseMap.h
@@ -1219,6 +1219,8 @@ public:
            "comparing incomparable iterators!");
     return Ptr == RHS.Ptr;
   }
+#if __cpp_impl_three_way_comparison >= 201711
+#else
   bool operator!=(const ConstIterator &RHS) const {
     assert((!Ptr || isHandleInSync()) && "handle not in sync!");
     assert((!RHS.Ptr || RHS.isHandleInSync()) && "handle not in sync!");
@@ -1226,6 +1228,7 @@ public:
            "comparing incomparable iterators!");
     return Ptr != RHS.Ptr;
   }
+#endif
 
   inline DenseMapIterator& operator++() {  // Preincrement
     assert(isHandleInSync() && "invalid iterator access!");