diff --git a/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c b/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c
index 48e46f8c24b7fd648ddfca578adc9d373d229a78..5b1e4f1613234d7b123b885fbf9b411eeec9363e 100644
--- a/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c
+++ b/sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c
@@ -105,7 +105,8 @@ void gnrc_ndp_internal_set_state(gnrc_ipv6_nc_t *nc_entry, uint8_t state)
             DEBUG("REACHABLE (reachable time = %" PRIu32 " us)\n", ipv6_iface->reach_time);
             t = ipv6_iface->reach_time;
 
-            /* we intentionally fall through here to set the desired timeout t */
+            /* Falls through. */
+            /* this is intentional to set the desired timeout t */
         case GNRC_IPV6_NC_STATE_DELAY:
 #if ENABLE_DEBUG
             if (state == GNRC_IPV6_NC_STATE_DELAY) {