diff --git a/lib/libc/sys/semctl.2 b/lib/libc/sys/semctl.2
index 6f4b58f5516..57f5859f370 100644
--- a/lib/libc/sys/semctl.2
+++ b/lib/libc/sys/semctl.2
@@ -36,7 +36,7 @@
 .Fd #include <sys/ipc.h>
 .Fd #include <sys/sem.h>
 .Ft int
-.Fn "semctl" "int semid" "int semnum" "int cmd" "union semun *arg"
+.Fn "semctl" "int semid" "int semnum" "int cmd" "union semun arg"
 .Sh DESCRIPTION
 .Fn Semctl
 performs the operation indicated by