diff --git a/emmental/options.py b/emmental/options.py
index 3a8f659..44f6c45 100644
--- a/emmental/options.py
+++ b/emmental/options.py
@@ -6,7 +6,7 @@ Version = GLib.OptionEntry()
 Version.long_name = "version"
 Version.short_name = ord("v")
 Version.flags = GLib.OptionFlags.NONE
-Version.arg = GLib.OptionArg.NONE
+# Version.arg = GLib.OptionArg.NONE
 Version.arg_data = None
 Version.description = "Print version information and exit"
 Version.arg_description = None