diff --git a/scripts/set_usb_mode.sh b/scripts/set_usb_mode.sh
index 25e35db..35a2fe8 100755
--- a/scripts/set_usb_mode.sh
+++ b/scripts/set_usb_mode.sh
@@ -132,7 +132,7 @@ rndis_down() {
 
 rndis_up() {
   log_debug "Enable rndis interface"
-  ifconfig rndis0 192.168.2.15 255.255.255.0  2> /dev/null || :
+  ifconfig rndis0 192.168.2.15 netmask 255.255.255.0  2> /dev/null || :
 }
 
 udhcpd_configure() {
diff --git a/src/usb_moded-network.c b/src/usb_moded-network.c
index b686f2a..1175b1d 100644
--- a/src/usb_moded-network.c
+++ b/src/usb_moded-network.c
@@ -1192,7 +1192,7 @@ int network_up(const modedata_t *data)
     }
     else
     {
-        sprintf(command, "ifconfig %s %s %s\n", interface, ip, netmask);
+        sprintf(command, "ifconfig %s %s netmask %s\n", interface, ip, netmask);
         common_system(command);
     }