diff --git a/ipc/shm.c b/ipc/shm.c
index ce1ca9f7c6e9..0ba6add05b35 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1332,7 +1332,7 @@ static int copy_compat_shmid_from_user(struct shmid64_ds *out, void __user *buf,
 	}
 }
 
-long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr, int version)
+static long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr, int version)
 {
 	struct ipc_namespace *ns;
 	struct shmid64_ds sem64;