diff --git a/wireless/ieee802154/mac802154.c b/wireless/ieee802154/mac802154.c
index b7b4b3ca3e..cfc59700da 100644
--- a/wireless/ieee802154/mac802154.c
+++ b/wireless/ieee802154/mac802154.c
@@ -188,6 +188,7 @@ int mac802154_txdesc_alloc(FAR struct ieee802154_privmac_s *priv,
         {
           /* MAC is already released */
 
+          wlwarn("WARNING: mac802154_takesem failed: %d\n", ret);
           return -EINTR;
         }
 
@@ -199,6 +200,8 @@ int mac802154_txdesc_alloc(FAR struct ieee802154_privmac_s *priv,
       ret = mac802154_takesem(&priv->exclsem, allow_interrupt);
       if (ret < 0)
         {
+          wlwarn("WARNING: mac802154_takesem failed: %d\n", ret);
+
           mac802154_givesem(&priv->txdesc_sem);
           return -EINTR;
         }
diff --git a/wireless/ieee802154/mac802154_data.c b/wireless/ieee802154/mac802154_data.c
index bd06e58b16..0676c52103 100644
--- a/wireless/ieee802154/mac802154_data.c
+++ b/wireless/ieee802154/mac802154_data.c
@@ -149,7 +149,7 @@ int mac802154_req_data(MACHANDLE mac,
     {
       /* Should only fail if interrupted by a signal */
 
-      wlwarn("WARNING: mac802154_takesem failed: %d", ret);
+      wlwarn("WARNING: mac802154_takesem failed: %d\n", ret);
       return ret;
     }
 
@@ -239,7 +239,7 @@ int mac802154_req_data(MACHANDLE mac,
        * exclsem.  So the lock is not held if a failure is returned.
        */
 
-      wlwarn("WARNING: mac802154_txdesc_alloc failed: %d", ret);
+      wlwarn("WARNING: mac802154_txdesc_alloc failed: %d\n", ret);
       return ret;
     }