diff --git a/api-ref/src/wadls/netconn-api/src/common.ent b/api-ref/src/wadls/netconn-api/src/common.ent
index a0f3e49ec..94a8c7743 100644
--- a/api-ref/src/wadls/netconn-api/src/common.ent
+++ b/api-ref/src/wadls/netconn-api/src/common.ent
@@ -452,7 +452,7 @@
          <wadl:doc xmlns:wadl="http://wadl.dev.java.net/2009/02" xmlns="http://docbook.org/ns/docbook" xml:lang="EN">
              <para>The gateway IP address.</para></wadl:doc>
      </param>
-     <param xmlns="http://wadl.dev.java.net/2009/02" required="false"
+     <param xmlns="http://wadl.dev.java.net/2009/02" required="true"
          name="ip_version" style="plain" type="xsd:string">
          <wadl:doc xmlns:wadl="http://wadl.dev.java.net/2009/02" xmlns="http://docbook.org/ns/docbook" xml:lang="EN">
              <para>The IP version, which is 4 or 6.</para></wadl:doc>