diff -r 3949b825f4bf -r faf0414a8b51 libpurple/protocols/msn/transaction.h
--- a/libpurple/protocols/msn/transaction.h	Tue Aug 20 14:04:56 2013 +0200
+++ b/libpurple/protocols/msn/transaction.h	Wed Aug 21 14:59:29 2013 +0200
@@ -75,7 +75,7 @@
 void msn_transaction_queue_cmd(MsnTransaction *trans, MsnCommand *cmd);
 void msn_transaction_unqueue_cmd(MsnTransaction *trans, MsnCmdProc *cmdproc);
 void msn_transaction_set_payload(MsnTransaction *trans,
-								 const char *payload, int payload_len);
+								 const char *payload, gsize payload_len);
 void msn_transaction_set_data(MsnTransaction *trans, void *data);
 void msn_transaction_set_data_free(MsnTransaction *trans, GDestroyNotify fn);
 void msn_transaction_set_saveable(MsnTransaction  *trans, gboolean saveable);