diff --git a/doc/xmlrpc/aria2mon b/doc/xmlrpc/aria2mon
index 6e6dd277..01b3eab8 100755
--- a/doc/xmlrpc/aria2mon
+++ b/doc/xmlrpc/aria2mon
@@ -140,7 +140,7 @@ result.each { |entry|
   end
   print "\n"
 
-  files=client.call("aria2.getFiles",entry['gid'])
+  files=client_call(client,"aria2.getFiles",entry['gid'])
   if files.length > 0 then
     first_file=files.find{|file| file["selected"]=="true"}
     if first_file != nil then