diff --git a/sys/net/gnrc/network_layer/ipv6/nib/_nib-6ln.c b/sys/net/gnrc/network_layer/ipv6/nib/_nib-6ln.c
index cea439d7cf..c2a209cfdb 100644
--- a/sys/net/gnrc/network_layer/ipv6/nib/_nib-6ln.c
+++ b/sys/net/gnrc/network_layer/ipv6/nib/_nib-6ln.c
@@ -163,11 +163,9 @@ uint8_t _handle_aro(gnrc_netif_t *netif, const ipv6_hdr_t *ipv6,
         (void)nce;
 #endif  /* CONFIG_GNRC_IPV6_NIB_6LR */
     }
-#if ENABLE_DEBUG
     else if (aro->len != SIXLOWPAN_ND_OPT_AR_LEN) {
         DEBUG("nib: ARO of unexpected length %u, ignoring ARO\n", aro->len);
     }
-#endif  /* ENABLE_DEBUG */
     return _ADDR_REG_STATUS_IGNORE;
 }
 
diff --git a/sys/net/gnrc/network_layer/ipv6/nib/_nib-arsm.c b/sys/net/gnrc/network_layer/ipv6/nib/_nib-arsm.c
index 93add394c3..1ec45edf22 100644
--- a/sys/net/gnrc/network_layer/ipv6/nib/_nib-arsm.c
+++ b/sys/net/gnrc/network_layer/ipv6/nib/_nib-arsm.c
@@ -133,11 +133,9 @@ void _handle_sl2ao(gnrc_netif_t *netif, const ipv6_hdr_t *ipv6,
             }
 #endif  /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_DAD && CONFIG_GNRC_IPV6_NIB_6LR */
         }
-#if ENABLE_DEBUG
         else {
             DEBUG("nib: Neighbor cache full\n");
         }
-#endif  /* ENABLE_DEBUG */
     }
     /* not else to include NCE created in nce == NULL branch */
     if ((nce != NULL) && (nce->mode & _NC)) {
@@ -322,7 +320,6 @@ void _probe_nbr(_nib_onl_entry_t *nbr, bool reset)
                         nbr->ns_sent++;
                     }
                 }
-#if ENABLE_DEBUG
                 else {
                     DEBUG("multicast to %s's solicited nodes (skipping since there is already "
                           "a multicast NS within %ums)\n",
@@ -330,7 +327,6 @@ void _probe_nbr(_nib_onl_entry_t *nbr, bool reset)
                                            sizeof(addr_str)),
                           (unsigned)netif->ipv6.retrans_time);
                 }
-#endif  /* ENABLE_DEBUG */
                 gnrc_netif_release(netif);
             }
             break;
diff --git a/sys/net/gnrc/network_layer/ipv6/nib/_nib-internal.c b/sys/net/gnrc/network_layer/ipv6/nib/_nib-internal.c
index f0278366cc..c15d6ef414 100644
--- a/sys/net/gnrc/network_layer/ipv6/nib/_nib-internal.c
+++ b/sys/net/gnrc/network_layer/ipv6/nib/_nib-internal.c
@@ -111,11 +111,9 @@ _nib_onl_entry_t *_nib_onl_alloc(const ipv6_addr_t *addr, unsigned iface)
     if (node != NULL) {
         _override_node(addr, iface, node);
     }
-#if ENABLE_DEBUG
     else {
         DEBUG("  NIB full\n");
     }
-#endif  /* ENABLE_DEBUG */
     return node;
 }
 
diff --git a/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c b/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c
index 2f3129b76e..f25da7a9d8 100644
--- a/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c
+++ b/sys/net/gnrc/network_layer/ndp/gnrc_ndp.c
@@ -50,11 +50,9 @@ gnrc_pktsnip_t *gnrc_ndp_nbr_sol_build(const ipv6_addr_t *tgt,
         nbr_sol->tgt.u64[0].u64 = tgt->u64[0].u64;
         nbr_sol->tgt.u64[1].u64 = tgt->u64[1].u64;
     }
-#if ENABLE_DEBUG
     else {
         DEBUG("ndp: NS not created due to no space in packet buffer\n");
     }
-#endif
     return pkt;
 }
 
@@ -73,11 +71,9 @@ gnrc_pktsnip_t *gnrc_ndp_nbr_adv_build(const ipv6_addr_t *tgt, uint8_t flags,
         nbr_adv->tgt.u64[0].u64 = tgt->u64[0].u64;
         nbr_adv->tgt.u64[1].u64 = tgt->u64[1].u64;
     }
-#if ENABLE_DEBUG
     else {
         DEBUG("ndp: NA not created due to no space in packet buffer\n");
     }
-#endif
     return pkt;
 }
 
@@ -91,11 +87,9 @@ gnrc_pktsnip_t *gnrc_ndp_rtr_sol_build(gnrc_pktsnip_t *options)
         ndp_rtr_sol_t *rtr_sol = pkt->data;
         rtr_sol->resv.u32 = 0;
     }
-#if ENABLE_DEBUG
     else {
         DEBUG("ndp: RS not created due to no space in packet buffer\n");
     }
-#endif
     return pkt;
 }
 
@@ -116,11 +110,9 @@ gnrc_pktsnip_t *gnrc_ndp_rtr_adv_build(uint8_t cur_hl, uint8_t flags,
         rtr_adv->reach_time = byteorder_htonl(reach_time);
         rtr_adv->retrans_timer = byteorder_htonl(retrans_timer);
     }
-#if ENABLE_DEBUG
     else {
         DEBUG("ndp: RA not created due to no space in packet buffer\n");
     }
-#endif
     return pkt;
 }
 
@@ -141,11 +133,9 @@ gnrc_pktsnip_t *gnrc_ndp_opt_build(uint8_t type, size_t size,
         opt->type = type;
         opt->len = (uint8_t)(pkt->size / 8);
     }
-#if ENABLE_DEBUG
     else {
         DEBUG("ndp: option not created due to no space in packet buffer\n");
     }
-#endif
     return pkt;
 }