diff --git a/net/icmpv6/icmpv6_neighbor.c b/net/icmpv6/icmpv6_neighbor.c
index 991612463d2..a899c196e71 100644
--- a/net/icmpv6/icmpv6_neighbor.c
+++ b/net/icmpv6/icmpv6_neighbor.c
@@ -257,6 +257,11 @@ int icmpv6_neighbor(FAR struct net_driver_s *dev,
 
       net_ipv6addr_copy(lookup, dev->d_ipv6draddr);
 #endif
+
+      if (net_is_addr_unspecified(lookup))
+        {
+          return -EHOSTUNREACH;
+        }
     }
 
   /* No ARP packet if this device do not support ARP */
diff --git a/net/neighbor/neighbor_ethernet_out.c b/net/neighbor/neighbor_ethernet_out.c
index f3b0870c879..1e753a76785 100644
--- a/net/neighbor/neighbor_ethernet_out.c
+++ b/net/neighbor/neighbor_ethernet_out.c
@@ -135,6 +135,12 @@ void neighbor_ethernet_out(FAR struct net_driver_s *dev)
 
           net_ipv6addr_copy(ipaddr, dev->d_ipv6draddr);
 #endif
+
+          if (net_is_addr_unspecified(ipaddr))
+            {
+              dev->d_len = 0;
+              return;
+            }
         }
       else
         {