diff --git a/include/rapidjson/document.h b/include/rapidjson/document.h
index 0c4c229e..4f1e2467 100644
--- a/include/rapidjson/document.h
+++ b/include/rapidjson/document.h
@@ -1092,7 +1092,7 @@ public:
      */
     template <typename T> RAPIDJSON_DISABLEIF_RETURN((internal::IsGenericValue<T>), (bool)) operator!=(const T& rhs) const { return !(*this == rhs); }
 
-#ifndef __cpp_lib_three_way_comparison
+#ifndef __cpp_impl_three_way_comparison
     //! Equal-to operator with arbitrary types (symmetric version)
     /*! \return (rhs == lhs)
      */