diff --git a/net/can/raw.c b/net/can/raw.c
index 3a7dffb6519ce9083b876b64f823cffcb1020c3d..da99cf153b33737ce45a06e71fc89037b96096b3 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -445,7 +445,7 @@ static int raw_setsockopt(struct socket *sock, int level, int optname,
 				return -EFAULT;
 			}
 		} else if (count == 1) {
-			if (copy_from_user(&sfilter, optval, optlen))
+			if (copy_from_user(&sfilter, optval, sizeof(sfilter)))
 				return -EFAULT;
 		}