diff --git a/src/core/dhcp.c b/src/core/dhcp.c
index e2f1bc4a..6605fd38 100644
--- a/src/core/dhcp.c
+++ b/src/core/dhcp.c
@@ -932,9 +932,9 @@ static err_t dhcp_release(struct netif *netif)
   /* idle DHCP client */
   dhcp_set_state(dhcp, DHCP_OFF);
   /* clean old DHCP offer */
-  dhcp->server_ip_addr = 0;
-  dhcp->offered_ip_addr = dhcp->offered_sn_mask = 0;
-  dhcp->offered_gw_addr = dhcp->offered_bc_addr = 0;
+  dhcp->server_ip_addr.addr = 0;
+  dhcp->offered_ip_addr.addr = dhcp->offered_sn_mask.addr = 0;
+  dhcp->offered_gw_addr.addr = dhcp->offered_bc_addr.addr = 0;
   dhcp->offered_t0_lease = dhcp->offered_t1_renew = dhcp->offered_t2_rebind = 0;
   dhcp->dns_count = 0;