diff --git a/net/sixlowpan/sixlowpan_icmpv6send.c b/net/sixlowpan/sixlowpan_icmpv6send.c
index 0b3090814a..0e7448edcd 100644
--- a/net/sixlowpan/sixlowpan_icmpv6send.c
+++ b/net/sixlowpan/sixlowpan_icmpv6send.c
@@ -121,7 +121,7 @@ void sixlowpan_icmpv6_send(FAR struct net_driver_s *dev,
           if (hdrlen > dev->d_len)
             {
               nwarn("WARNING:  Dropping small ICMPv6 packet: %u < %u\n",
-                    buflen, hdrlen);
+                    dev->d_len, hdrlen);
             }
           else
             {
diff --git a/net/sixlowpan/sixlowpan_tcpsend.c b/net/sixlowpan/sixlowpan_tcpsend.c
index f5b7416416..a127dd9743 100644
--- a/net/sixlowpan/sixlowpan_tcpsend.c
+++ b/net/sixlowpan/sixlowpan_tcpsend.c
@@ -907,7 +907,7 @@ void sixlowpan_tcp_send(FAR struct net_driver_s *dev,
           if (hdrlen > dev->d_len)
             {
               nwarn("WARNING:  Dropping small TCP packet: %u < %u\n",
-                    buflen, hdrlen);
+                    dev->d_len, hdrlen);
             }
           else
             {
diff --git a/net/sixlowpan/sixlowpan_udpsend.c b/net/sixlowpan/sixlowpan_udpsend.c
index fd08b7b09b..d0a6d26ad9 100644
--- a/net/sixlowpan/sixlowpan_udpsend.c
+++ b/net/sixlowpan/sixlowpan_udpsend.c
@@ -459,7 +459,7 @@ void sixlowpan_udp_send(FAR struct net_driver_s *dev,
           if (hdrlen > dev->d_len)
             {
               nwarn("WARNING:  Dropping small UDP packet: %u < %u\n",
-                    buflen, hdrlen);
+                    dev->d_len, hdrlen);
             }
           else
             {