diff --git a/src/core/ipv4/ip4.c b/src/core/ipv4/ip4.c
index ff7b937c..fb6777a6 100644
--- a/src/core/ipv4/ip4.c
+++ b/src/core/ipv4/ip4.c
@@ -136,7 +136,6 @@ ip4_route_src(const ip4_addr_t *dest, const ip4_addr_t *src)
 #endif /* LWIP_HOOK_IP4_ROUTE_SRC */
 
 /**
- * @ingroup ip4
  * Finds the appropriate network interface for a given IP address. It
  * searches the list of network interfaces linearly. A match is found
  * if the masked IP address of the network interface equals the masked
diff --git a/src/core/ipv6/ip6.c b/src/core/ipv6/ip6.c
index bfbe453f..aa39f58c 100644
--- a/src/core/ipv6/ip6.c
+++ b/src/core/ipv6/ip6.c
@@ -60,7 +60,6 @@
 #include "lwip/stats.h"
 
 /**
- * @ingroup ip6
  * Finds the appropriate network interface for a given IPv6 address. It tries to select
  * a netif following a sequence of heuristics:
  * 1) if there is only 1 netif, return it