diff -r fb9987d6df5d -r 0677d0506878 xmpp-fingerprint.lua
--- a/xmpp-fingerprint.lua	Sat May 08 19:28:19 2010 +0100
+++ b/xmpp-fingerprint.lua	Sat May 08 19:28:35 2010 +0100
@@ -56,7 +56,7 @@
 
 -- Process flags --
 local function process_args(arg)
-	local f = arg[1] and arg[1]:match("^%-(%S+)");
+	local f = arg[1] and arg[1]:match("^%-%-?(%S+)");
 	if f then
 		table.remove(arg, 1);
 		if flags[f] then