diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 1fe9d3f31a73..95bd6ab8115d 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5384,7 +5384,7 @@ static int sched_dynamic_mode(const char *str)
 	if (!strcmp(str, "full"))
 		return preempt_dynamic_full;
 
-	return -1;
+	return -EINVAL;
 }
 
 static void sched_dynamic_update(int mode)