diff --git a/src/netif/bridgeif_fdb.c b/src/netif/bridgeif_fdb.c
index f0a48baa..70ffeda1 100644
--- a/src/netif/bridgeif_fdb.c
+++ b/src/netif/bridgeif_fdb.c
@@ -35,6 +35,12 @@
  *
  */
 
+/**
+ * @defgroup bridgeif_fdb FDB example code
+ * @ingroup bridgeif
+ * This file implements an example for an FDB (Forwarding DataBase)
+ */
+
 #include "netif/bridgeif.h"
 #include "lwip/sys.h"
 #include "lwip/timeouts.h"
@@ -56,7 +62,9 @@ typedef struct bridgeif_dfdb_s {
   bridgeif_dfdb_entry_t *fdb;
 } bridgeif_dfdb_t;
 
-/** A real simple and slow implementation of an auto-learning forwarding database that
+/**
+ * @ingroup bridgeif_fdb
+ * A real simple and slow implementation of an auto-learning forwarding database that
  * remembers known src mac addresses to know which port to send frames destined for that
  * mac address.
  *
@@ -111,7 +119,10 @@ bridgeif_fdb_update_src(void *fdb_ptr, struct eth_addr *src_addr, u8_t port_idx)
   /* not found, no free entry -> flood */
 }
 
-/** Walk our list of auto-learnt fdb entries and return a port to forward or BR_FLOOD if unknown */
+/** 
+ * @ingroup bridgeif_fdb
+ * Walk our list of auto-learnt fdb entries and return a port to forward or BR_FLOOD if unknown 
+ */
 bridgeif_portmask_t
 bridgeif_fdb_get_dst_ports(void *fdb_ptr, struct eth_addr *dst_addr)
 {
@@ -133,7 +144,10 @@ bridgeif_fdb_get_dst_ports(void *fdb_ptr, struct eth_addr *dst_addr)
   return BR_FLOOD;
 }
 
-/** Aging implementation of our simple fdb */
+/**
+ * @ingroup bridgeif_fdb
+ * Aging implementation of our simple fdb
+ */
 static void
 bridgeif_fdb_age_one_second(void *fdb_ptr)
 {
@@ -172,7 +186,10 @@ bridgeif_age_tmr(void *arg)
   sys_timeout(BRIDGEIF_AGE_TIMER_MS, bridgeif_age_tmr, arg);
 }
 
-/** Init our simple fdb list */
+/**
+ * @ingroup bridgeif_fdb
+ * Init our simple fdb list
+ */
 void *
 bridgeif_fdb_init(u16_t max_fdb_entries)
 {