diff --git a/src/core/netif.c b/src/core/netif.c
index d6b755c4..e0af3dbf 100644
--- a/src/core/netif.c
+++ b/src/core/netif.c
@@ -125,6 +125,9 @@ static void netif_issue_reports(struct netif *netif, u8_t report_type);
 #if LWIP_IPV6
 static err_t netif_null_output_ip6(struct netif *netif, struct pbuf *p, const ip6_addr_t *ipaddr);
 #endif /* LWIP_IPV6 */
+#if LWIP_IPV4
+static err_t netif_null_output_ip4(struct netif *netif, struct pbuf *p, const ip4_addr_t *ipaddr);
+#endif /* LWIP_IPV4 */
 
 #if LWIP_HAVE_LOOPIF
 #if LWIP_IPV4
@@ -300,6 +303,7 @@ netif_add(struct netif *netif,
   ip_addr_set_zero_ip4(&netif->ip_addr);
   ip_addr_set_zero_ip4(&netif->netmask);
   ip_addr_set_zero_ip4(&netif->gw);
+  netif->output = netif_null_output_ip4;
 #endif /* LWIP_IPV4 */
 #if LWIP_IPV6
   for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
@@ -1578,6 +1582,20 @@ netif_null_output_ip6(struct netif *netif, struct pbuf *p, const ip6_addr_t *ipa
 }
 #endif /* LWIP_IPV6 */
 
+#if LWIP_IPV4
+/** Dummy IPv4 output function for netifs not supporting IPv4
+ */
+static err_t
+netif_null_output_ip4(struct netif *netif, struct pbuf *p, const ip4_addr_t *ipaddr)
+{
+  LWIP_UNUSED_ARG(netif);
+  LWIP_UNUSED_ARG(p);
+  LWIP_UNUSED_ARG(ipaddr);
+
+  return ERR_IF;
+}
+#endif /* LWIP_IPV4 */
+
 /**
 * @ingroup netif
 * Return the interface index for the netif with name
diff --git a/src/netif/lowpan6.c b/src/netif/lowpan6.c
index 8a3a6af0..256e69e1 100644
--- a/src/netif/lowpan6.c
+++ b/src/netif/lowpan6.c
@@ -778,22 +778,6 @@ lowpan6_set_short_addr(u8_t addr_high, u8_t addr_low)
 }
 #endif /* LWIP_6LOWPAN_INFER_SHORT_ADDRESS */
 
-#if LWIP_IPV4
-/**
- * @ingroup sixlowpan
- * IPv4 output
- */
-err_t
-lowpan4_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr)
-{
-  (void)netif;
-  (void)q;
-  (void)ipaddr;
-
-  return ERR_IF;
-}
-#endif /* LWIP_IPV4 */
-
 /* Create IEEE 802.15.4 address from netif address */
 static err_t
 lowpan6_hwaddr_to_addr(struct netif *netif, struct ieee_802154_addr *addr)
@@ -1500,9 +1484,6 @@ lowpan6_if_init(struct netif *netif)
 {
   netif->name[0] = 'L';
   netif->name[1] = '6';
-#if LWIP_IPV4
-  netif->output = lowpan4_output;
-#endif /* LWIP_IPV4 */
   netif->output_ip6 = lowpan6_output;
 
   MIB2_INIT_NETIF(netif, snmp_ifType_other, 0);
diff --git a/src/netif/lowpan6_ble.c b/src/netif/lowpan6_ble.c
index 761d5cd0..cf96a387 100644
--- a/src/netif/lowpan6_ble.c
+++ b/src/netif/lowpan6_ble.c
@@ -960,10 +960,6 @@ rfc7668_if_init(struct netif *netif)
 {
   netif->name[0] = 'b';
   netif->name[1] = 't';
-  /* if compiled with LWIP_IPV4 -> set IPv4 output to NULL */
-#if LWIP_IPV4
-  netif->output = NULL;
-#endif
   /* local function as IPv6 output */
   netif->output_ip6 = rfc7668_output;