diff --git a/src/corelib/global/q20type_traits.h b/src/corelib/global/q20type_traits.h
index 2e812ed39c7..80ac1fa4313 100644
--- a/src/corelib/global/q20type_traits.h
+++ b/src/corelib/global/q20type_traits.h
@@ -38,6 +38,19 @@ using remove_cvref_t = std::remove_cv_t<std::remove_reference_t<T>>;
 #endif // __cpp_lib_remove_cvref
 }
 
+namespace q20 {
+// like std::type_identity(_t)
+#ifdef __cpp_lib_type_identity
+using std::type_identity;
+using std::type_identity_t;
+#else
+template <typename T>
+struct type_identity { using type = T; };
+template <typename T>
+using type_identity_t = typename type_identity<T>::type;
+#endif // __cpp_lib_type_identity
+}
+
 QT_END_NAMESPACE
 
 #endif /* Q20TYPE_TRAITS_H */