@@ -141,20 +141,21 @@
 #else
 # error of_thread_detach not implemented!
 #endif
 }
 
-static OF_INLINE void OF_NO_RETURN
+static OF_INLINE void noreturn
 of_thread_exit(void)
 {
 #if defined(OF_HAVE_PTHREADS)
 	pthread_exit(NULL);
 #elif defined(_WIN32)
 	ExitThread(0);
 #else
 # error of_thread_exit not implemented!
 #endif
+	OF_UNREACHABLE
 }
 
 static OF_INLINE void
 of_once(of_once_t *control, void (*func)(void))
 {