diff --git a/kernel/syscall.c b/kernel/syscall.c
index 8a919e16..0a540731 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -9676,7 +9676,9 @@ SYSCALL_DECLARE(mbind)
 		return -EINVAL;
 	}
 
+#ifdef ENABLE_FUGAKU_HACKS
 	return 0;
+#endif
 
 	memset(numa_mask, 0, sizeof(numa_mask));