diff --git a/src/www/vpn_openvpn_csc.php b/src/www/vpn_openvpn_csc.php
index 38675db42..d3ddbef55 100644
--- a/src/www/vpn_openvpn_csc.php
+++ b/src/www/vpn_openvpn_csc.php
@@ -31,6 +31,7 @@ require_once("guiconfig.inc");
 require_once("openvpn.inc");
 require_once("services.inc");
 require_once("interfaces.inc");
+require_once("plugins.inc");
 
 // define all fields used in this form
 $all_form_fields = "custom_options,disable,common_name,block,description
diff --git a/src/www/vpn_openvpn_export.php b/src/www/vpn_openvpn_export.php
index 369235ce2..065c9f8ab 100644
--- a/src/www/vpn_openvpn_export.php
+++ b/src/www/vpn_openvpn_export.php
@@ -32,6 +32,7 @@ require_once("openvpn.inc");
 require_once("services.inc");
 require_once("filter.inc");
 require_once("interfaces.inc");
+require_once("plugins.inc");
 require_once("openvpn-client-export.inc");
 
 global $current_openvpn_version, $current_openvpn_version_rev;