diff --git a/net/sixlowpan/sixlowpan_framelist.c b/net/sixlowpan/sixlowpan_framelist.c
index 28669a56fc..083249f96f 100644
--- a/net/sixlowpan/sixlowpan_framelist.c
+++ b/net/sixlowpan/sixlowpan_framelist.c
@@ -207,8 +207,8 @@ static uint16_t sixlowpan_protosize(FAR const struct ipv6_hdr_s *ipv6hdr,
 
 #ifdef CONFIG_WIRELESS_IEEE802154
 static int sixlowpan_ieee802154_metadata(FAR struct radio_driver_s *radio,
-                                         FAR const struct netdev_varaddr_s *destmac,
-                                         FAR union sixlowpan_metadata_u *meta)
+                                 FAR const struct netdev_varaddr_s *destmac,
+                                 FAR union sixlowpan_metadata_u *meta)
 {
   struct ieee802_txmetadata_s pktmeta;
   int ret;
@@ -306,8 +306,8 @@ static int sixlowpan_ieee802154_metadata(FAR struct radio_driver_s *radio,
 
 #ifdef CONFIG_WIRELESS_PKTRADIO
 static int sixlowpan_pktradio_metadata(FAR struct radio_driver_s *radio,
-                                       FAR const struct netdev_varaddr_s *destmac,
-                                       FAR union sixlowpan_metadata_u *meta)
+                               FAR const struct netdev_varaddr_s *destmac,
+                               FAR union sixlowpan_metadata_u *meta)
 {
   FAR struct pktradio_metadata_s *pktmeta = &meta->pktradio;
 
@@ -568,8 +568,8 @@ int sixlowpan_queue_frames(FAR struct radio_driver_s *radio,
        *   1. Datagram size describes the total (un-fragmented) payload.
        *   2. Datagram tag identifies the set of fragments and is used to
        *      match fragments of the same payload.
-       *   3. Datagram offset identifies the fragment’s offset within the un-
-       *      fragmented payload.
+       *   3. Datagram offset identifies the fragment’s offset within the
+       *      unfragmented payload.
        *
        * The fragment header length is 4 bytes for the first header and 5
        * bytes for all subsequent headers.
diff --git a/net/sixlowpan/sixlowpan_input.c b/net/sixlowpan/sixlowpan_input.c
index 585b8b7d4b..012fd87a7b 100644
--- a/net/sixlowpan/sixlowpan_input.c
+++ b/net/sixlowpan/sixlowpan_input.c
@@ -412,7 +412,7 @@ static int sixlowpan_frame_process(FAR struct radio_driver_s *radio,
         {
           /* The packet is a fragment but its size does not match. */
 
-          nwarn("WARNING: Dropping 6LoWPAN packet. Bad fragsize: %u vs &u\n",
+          nwarn("WARNING: Dropping 6LoWPAN packet. Bad fragsize: %u vs %u\n",
                 fragsize, reass->rb_pktlen);
           ret = -EPERM;
           goto errout_with_reass;
@@ -855,7 +855,7 @@ int sixlowpan_input(FAR struct radio_driver_s *radio,
 
                   if (hdrlen > radio->r_dev.d_len)
                     {
-                      nwarn("WARNING: Packet too small: Have %u need >%u\n",
+                      nwarn("WARNING: Packet too small: Have %u need >%zu\n",
                             radio->r_dev.d_len, hdrlen);
                       goto drop;
                     }