diff --git a/files/nicklock.c b/files/nicklock.c
index 1037a94..6fb56c3 100644
--- a/files/nicklock.c
+++ b/files/nicklock.c
@@ -251,7 +251,11 @@ CMD_FUNC(NICKUNLOCK)
 CMD_OVERRIDE_FUNC(nick_override)
 {
 	if (!IsNickLock(client))
+	{
 		CallCommandOverride(ovr, client, recv_mtags, parc, parv);
+		return;
+	}
+	sendnumeric(client, ERR_CANNOTDOCOMMAND, "NICK", "You have been blocked from changing nicks by an administrator.");
 	return;
 }