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-rw-r--r--net/ieee802154/6lowpan_iphc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ieee802154/6lowpan_iphc.c b/net/ieee802154/6lowpan_iphc.c
index 8857285b418b..b298bfc14943 100644
--- a/net/ieee802154/6lowpan_iphc.c
+++ b/net/ieee802154/6lowpan_iphc.c
@@ -557,7 +557,7 @@ static void compress_udp_header(u8 **hc06_ptr, struct sk_buff *skb)
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
tmp = /* subtraction is faster */
(u8)((ntohs(uh->dest) - LOWPAN_NHC_UDP_4BIT_PORT) +
- ((ntohs(uh->source) & LOWPAN_NHC_UDP_4BIT_PORT) << 4));
+ ((ntohs(uh->source) - LOWPAN_NHC_UDP_4BIT_PORT) << 4));
lowpan_push_hc_data(hc06_ptr, &tmp, sizeof(tmp));
} else if ((ntohs(uh->dest) & LOWPAN_NHC_UDP_8BIT_MASK) ==
LOWPAN_NHC_UDP_8BIT_PORT) {