diff --git a/utest.h b/utest.h
index 7f2bcaa..ceb1cf5 100644
--- a/utest.h
+++ b/utest.h
@@ -384,7 +384,7 @@
           _Pragma("clang diagnostic pop")
 /* clang-format on */
 #else
-#define UTEST_AUTO(x) __auto_type
+#define UTEST_AUTO(x) __typeof__(x)
 #endif
 
 #else