--- a/mod_filter_chatstates/mod_filter_chatstates.lua	Fri Sep 04 00:29:08 2015 +0200
+++ b/mod_filter_chatstates/mod_filter_chatstates.lua	Fri Sep 04 00:41:29 2015 +0200
@@ -12,7 +12,7 @@
 			end
 		end);
 		if #stanza.tags == 0 then
-			return nil;
+			return "";
 		end
 	end
 	return stanza;