diff --git a/kernel/syscall.c b/kernel/syscall.c
index 3e0bc565..9c73be69 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -3884,7 +3884,7 @@ SYSCALL_DECLARE(perf_event_open)
 	}
 
 	if (not_supported_flag) {
-		return -1;
+		return -ENOENT;
 	}
 
 	event = mc_perf_event_alloc((struct perf_event_attr*)attr);