diff --git a/net/sctp/input.c b/net/sctp/input.c
index db76f1a..00b8445 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -606,7 +606,8 @@
 
 		/* PMTU discovery (RFC1191) */
 		if (ICMP_FRAG_NEEDED == code) {
-			sctp_icmp_frag_needed(sk, asoc, transport, info);
+			sctp_icmp_frag_needed(sk, asoc, transport,
+					      WORD_TRUNC(info));
 			goto out_unlock;
 		} else {
 			if (ICMP_PROT_UNREACH == code) {