diff --git a/src/opnsense/service/conf/actions.d/actions_interface.conf b/src/opnsense/service/conf/actions.d/actions_interface.conf
index 1f49fcc88..02538b596 100644
--- a/src/opnsense/service/conf/actions.d/actions_interface.conf
+++ b/src/opnsense/service/conf/actions.d/actions_interface.conf
@@ -43,7 +43,7 @@ message:update carp service status
 
 [list.arp]
 command:/usr/local/opnsense/scripts/interfaces/list_arp.py
-parameters: %s
+parameters:%s %s
 type:script_output
 message:request arp table