1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index c199d2311731..4d544573f48a 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -542,7 +542,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
                 inet->hdrincl = val ? 1 : 0;
                 break;
         case IP_MTU_DISCOVER:
-                if (val<0 || val>2)
+                if (val<0 || val>3)
                         goto e_inval;
                 inet->pmtudisc = val;
                 break;