diff --git a/utest.h b/utest.h
index 1970bca..e8b3b07 100644
--- a/utest.h
+++ b/utest.h
@@ -393,7 +393,7 @@
           _Pragma("clang diagnostic pop")
 /* clang-format on */
 #else
-#define UTEST_AUTO(x) __auto_type
+#define UTEST_AUTO(x) __typeof__(x)
 #endif
 
 #else