diff --git a/src/include/lwip/pbuf.h b/src/include/lwip/pbuf.h
index 83545ebd..82e51491 100644
--- a/src/include/lwip/pbuf.h
+++ b/src/include/lwip/pbuf.h
@@ -84,12 +84,14 @@ typedef enum {
    * @see @ref PBUF_LINK_HLEN
    */
   PBUF_LINK,
-  /** Includes spare room for additional encapsulation header before ethernet headers (e.g. 802.11).
+  /** Includes spare room for additional encapsulation header before ethernet
+   * headers (e.g. 802.11).
    * Use this if you intend to pass the pbuf to functions like netif->linkoutput().
    * @see @ref PBUF_LINK_ENCAPSULATION_HLEN
    */
   PBUF_RAW_TX,
-  /** Use this for input packets received by ethernet-layer netif drivers. */
+  /** Use this for input packets in a netif driver when calling netif->input()
+   * in the most common case - ethernet-layer netif driver. */
   PBUF_RAW
 } pbuf_layer;