diff --git a/kernel/poll.c b/kernel/poll.c
index b4e3897b9b1..9c29af7f42c 100644
--- a/kernel/poll.c
+++ b/kernel/poll.c
@@ -348,7 +348,7 @@ static inline int z_vrfy_k_poll(struct k_poll_event *events,
 	/* Validate the events buffer and make a copy of it in an
 	 * allocated kernel-side buffer.
 	 */
-	if (Z_SYSCALL_VERIFY(num_events >= 0U)) {
+	if (Z_SYSCALL_VERIFY(num_events >= 0)) {
 		ret = -EINVAL;
 		goto out;
 	}