diff -r 35d5e8fcc07b -r c8486462bb63 libpurple/protocols/jabber/auth_plain.c
--- a/libpurple/protocols/jabber/auth_plain.c	Tue Sep 10 15:34:10 2013 +0200
+++ b/libpurple/protocols/jabber/auth_plain.c	Tue Sep 10 21:47:37 2013 +0200
@@ -97,7 +97,7 @@
 			_("Plaintext Authentication"),
 			msg,
 			1,
-			account, NULL, NULL,
+			purple_request_cpar_from_account(account),
 			account, allow_plaintext_auth, disallow_plaintext_auth);
 	g_free(msg);
 	return JABBER_SASL_STATE_CONTINUE;