diff --git a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index 0343d6c..4fbae87 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -280,6 +280,7 @@
             <completers>
                 <ref component-id="connectPointCompleter"/>
                 <ref component-id="connectPointCompleter"/>
+                <null/> <!-- no more argument -->
             </completers>
             <optional-completers>
                 <entry key="-t" value-ref="ethTypeCompleter"/>
@@ -289,6 +290,7 @@
                 <entry key="--extHdr" value-ref="ExtHeaderCompleter"/>
                 <entry key="-a" value-ref="allAppNameCompleter"/>
                 <entry key="-e" value-ref="encapTypeCompleter"/>
+                <entry key="-r" value-ref="nullCompleter"/> <!-- option has no argument -->
             </optional-completers>
         </command>
         <command>