diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 3563788d064fb2dd1a34398ae1dd90766d7f4f1d..d2d294b0a1f1587c4290379d3c78ba9a4a8e281c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1282,8 +1282,6 @@ int udp_ioctl(struct sock *sk, int cmd, unsigned long arg)
 			 * of this packet since that is all
 			 * that will be read.
 			 */
-			amount -= sizeof(struct udphdr);
-
 		return put_user(amount, (int __user *)arg);
 	}