diff --git a/sys/kern/uipc_sem.c b/sys/kern/uipc_sem.c
index 588d6bf7012..e40c6c63a96 100644
--- a/sys/kern/uipc_sem.c
+++ b/sys/kern/uipc_sem.c
@@ -442,6 +442,9 @@ static void
 sem_free(struct ksem *ks)
 {
 
+#ifdef MAC
+	mac_posixsem_destroy(ks);
+#endif
 	nsems--;
 	if (ks->ks_onlist)
 		LIST_REMOVE(ks, ks_entry);