diff --git a/src/ejabberd_ctl.erl b/src/ejabberd_ctl.erl
index d8d067640..eda1c4970 100644
--- a/src/ejabberd_ctl.erl
+++ b/src/ejabberd_ctl.erl
@@ -418,6 +418,7 @@ is_supported_args(Args) ->
       fun({_Name, Format}) ->
 	      (Format == integer)
 		  or (Format == string)
+		      or (Format == binary)
       end,
       Args).