diff --git a/src/exit/at_quick_exit.c b/src/exit/at_quick_exit.c
index 34541bad..ac28dfd9 100644
--- a/src/exit/at_quick_exit.c
+++ b/src/exit/at_quick_exit.c
@@ -21,9 +21,10 @@ void __funcs_on_quick_exit()
 
 int at_quick_exit(void (*func)(void))
 {
-	if (count == 32) return -1;
+	int r = 0;
 	LOCK(lock);
-	funcs[count++] = func;
+	if (count == 32) r = -1;
+	else funcs[count++] = func;
 	UNLOCK(lock);
-	return 0;
+	return r;
 }