diff --git a/ipc/sem.c b/ipc/sem.c
index 77162ed..db161de 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -880,8 +880,8 @@
  * to be held in write mode.
  * NOTE: no locks must be held, the rw_mutex is taken inside this function.
  */
-static int semctl_down(struct ipc_namespace *ns, int semid, int semnum,
-		int cmd, int version, union semun arg)
+static int semctl_down(struct ipc_namespace *ns, int semid,
+		       int cmd, int version, union semun arg)
 {
 	struct sem_array *sma;
 	int err;
@@ -972,7 +972,7 @@
 		return err;
 	case IPC_RMID:
 	case IPC_SET:
-		err = semctl_down(ns,semid,semnum,cmd,version,arg);
+		err = semctl_down(ns, semid, cmd, version, arg);
 		return err;
 	default:
 		return -EINVAL;