1 files changed, 1 insertions, 0 deletions

diff --git a/src/nat/gnunet-service-nat_externalip.c b/src/nat/gnunet-service-nat_externalip.c
index 8df6f48a5..f79ff4070 100644
--- a/src/nat/gnunet-service-nat_externalip.c
+++ b/src/nat/gnunet-service-nat_externalip.c
@@ -182,6 +182,7 @@ handle_external_ip (void *cls,
   switch (result)
   {
   case GNUNET_NAT_ERROR_SUCCESS:
+    GNUNET_assert (NULL != addr);
     if (addr->s_addr == mini_external_ipv4.s_addr)
       return; /* not change */
     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,