diff --git a/lib/naughty.lua.in b/lib/naughty.lua.in
index 2c5bda89..f283e490 100644
--- a/lib/naughty.lua.in
+++ b/lib/naughty.lua.in
@@ -479,7 +479,7 @@ if capi.dbus then
         end
         return "u", "0"
     elseif data.member == "CloseNotification" then
-        local obj = getById(arg1)
+        local obj = getById(appname)
         if obj then
            destroy(obj)
         end