diff --git a/sys/net80211/ieee80211_output.c b/sys/net80211/ieee80211_output.c
index 506c9099180..1ebf7fa8723 100644
--- a/sys/net80211/ieee80211_output.c
+++ b/sys/net80211/ieee80211_output.c
@@ -1969,7 +1969,12 @@ ieee80211_free_mbuf(struct mbuf *m)
 	} while ((m = next) != NULL);
 }
 
-/*
+/**
+ * @brief Fragment the frame according to the specified mtu.
+ *
+ * This implements the fragmentation part of 802.11-2016 10.2.7
+ * (Fragmentation/defragmentation overview.)
+ *
  * Fragment the frame according to the specified mtu.
  * The size of the 802.11 header (w/o padding) is provided
  * so we don't need to recalculate it.  We create a new
@@ -1995,10 +2000,6 @@ ieee80211_free_mbuf(struct mbuf *m)
  * @param hdrsize	header size to reserver
  * @param ciphdrsize	crypto cipher header size to reserve
  * @param mtu		maximum fragment size
- *
- * This implements the fragmentation part of 802.11-2016 10.2.7
- * (Fragmentation/defragmentation overview.)
- *
  * @retval 1 if successful, with the mbuf pointed at by m0
  *   turned into an mbuf list of fragments (with the original
  *   mbuf being truncated.)