diff --git a/op-mode-definitions/show-arp.xml b/op-mode-definitions/show-arp.xml
index ef3e399f8..ddaccefec 100644
--- a/op-mode-definitions/show-arp.xml
+++ b/op-mode-definitions/show-arp.xml
@@ -1,24 +1,24 @@
 <?xml version="1.0"?>
 <interfaceDefinition>
   <node name="show">
     <children>
       <node name="arp">
         <properties>
           <help>Show Address Resolution Protocol (ARP) information</help>
         </properties>
         <command>/usr/sbin/arp -e -n</command>
         <children>
           <tagNode name="interface">
             <properties>
               <help>Show Address Resolution Protocol (ARP) cache for specified interface</help>
               <completionHelp>
                 <script>${vyos_completion_dir}/list_interfaces.py -b</script>
               </completionHelp>
             </properties>
-            <command>/usr/sbin/arp -e -n -i '$4'</command>
+            <command>/usr/sbin/arp -e -n -i $4</command>
           </tagNode>
         </children>
       </node>
     </children>
   </node>
 </interfaceDefinition>