diff --git a/etc/inc/pfsense-utils.inc b/etc/inc/pfsense-utils.inc
index 2ad26b44bc..d45fd64630 100644
--- a/etc/inc/pfsense-utils.inc
+++ b/etc/inc/pfsense-utils.inc
@@ -1743,6 +1743,8 @@ function execute_command_return_output($command) {
  * convert_friendly_interface_to_real_interface_name($interface): convert WAN to FXP0
  */
 function convert_friendly_interface_to_real_interface_name($interface) {
+	global $config;
+
 	$wanif = $interface;
 
 	switch ($interface) {