diff --git a/sys/net/network_layer/sixlowpan/icmp.c b/sys/net/network_layer/sixlowpan/icmp.c
index 65092fd2c2..30d6c65d9c 100644
--- a/sys/net/network_layer/sixlowpan/icmp.c
+++ b/sys/net/network_layer/sixlowpan/icmp.c
@@ -1523,7 +1523,10 @@ int ndp_addr_is_on_link(ipv6_addr_t *dest_addr)
     int if_id = -1;
 
     if ((nce = ndp_neighbor_cache_search(dest_addr))) {
+#ifdef DEBUG_ENABLED
+        char addr_str[IPV6_MAX_ADDR_STR_LEN];
         DEBUG("INFO: %s is in nbr cache\n", ipv6_addr_to_str(addr_str, IPV6_MAX_ADDR_STR_LEN, dest_addr));
+#endif
         return 1;
     }
 
diff --git a/sys/net/network_layer/sixlowpan/ip.c b/sys/net/network_layer/sixlowpan/ip.c
index 64e7c431a2..1dc4e9e76d 100644
--- a/sys/net/network_layer/sixlowpan/ip.c
+++ b/sys/net/network_layer/sixlowpan/ip.c
@@ -307,12 +307,23 @@ uint8_t ipv6_get_addr_match(const ipv6_addr_t *src,
     return val;
 }
 
-int is_our_address(ipv6_addr_t *addr)
+/**
+ * @brief Check if the given IPv6 address is assigned to any configured
+ *        interface
+ *
+ * @param[in] addr  The IPv6 address to check
+ *
+ * @return 1    If *addr* is assigned to at least one interface
+ * @return 0    If *addr* is not assigned to any interface
+ * @return -1   If no IPv6 address is configured to any interface
+ */
+static int is_our_address(ipv6_addr_t *addr)
 {
     ipv6_net_if_ext_t *net_if_ext;
     ipv6_net_if_addr_t *myaddr;
     uint8_t prefix, suffix;
     int if_id = -1;
+    unsigned counter = 0;
 
     DEBUGF("Is this my addres: %s?\n", ipv6_addr_to_str(addr_str, IPV6_MAX_ADDR_STR_LEN, addr));
     while ((if_id = net_if_iter_interfaces(if_id)) >= 0) {
@@ -323,6 +334,7 @@ int is_our_address(ipv6_addr_t *addr)
 
         while ((myaddr = (ipv6_net_if_addr_t *)net_if_iter_addresses(if_id,
                          (net_if_addr_t **) &myaddr)) != NULL) {
+            counter++;
             DEBUGF("\tCompare with: %s?\n", ipv6_addr_to_str(addr_str, IPV6_MAX_ADDR_STR_LEN, (ipv6_addr_t*) myaddr->addr_data));
             if ((ipv6_get_addr_match(myaddr->addr_data, addr) >= net_if_ext->prefix) &&
                 (memcmp(&addr->uint8[prefix], &myaddr->addr_data->uint8[prefix], suffix) == 0)) {
@@ -331,7 +343,11 @@ int is_our_address(ipv6_addr_t *addr)
         }
     }
 
-    return 0;
+    if (!counter) {
+        counter = -1;
+    }
+    /* return negative value if no address is configured so far */
+    return counter;
 }
 
 void *ipv6_process(void *arg)
@@ -362,8 +378,15 @@ void *ipv6_process(void *arg)
             }
         }
 
+        int addr_match = is_our_address(&ipv6_buf->destaddr);
+
+        /* no address configured for this node so far, exit early */
+        if (addr_match < 1) {
+            msg_reply(&m_recv_lowpan, &m_send_lowpan);
+            continue;
+        }
         /* destination is our address */
-        if (is_our_address(&ipv6_buf->destaddr)) {
+        else if (addr_match) {
             switch (*nextheader) {
                 case (IPV6_PROTO_NUM_ICMPV6): {
                     icmp_buf = get_icmpv6_buf(ipv6_ext_hdr_len);