1 files changed, 2 insertions, 0 deletions
diff --git a/src/dhcp.c b/src/dhcp.c
index f4de736a..3425b6d1 100644
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -227,6 +227,8 @@ static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 		gateway = g_strdup(option->data);
 
 	prefixlen = __connman_ipconfig_netmask_prefix_len(netmask);
+	if (prefixlen == 255)
+		connman_warn("netmask: %s is invalid", netmask);
 
 	DBG("c_address %s", c_address);