--- a/libpurple/protocols/msn/slpmsg.c Thu Aug 05 22:47:36 2010 +0000 +++ b/libpurple/protocols/msn/slpmsg.c Thu Aug 05 23:09:12 2010 +0000 @@ -246,7 +246,7 @@ slpmsg->size = header->total_size; slpmsg->flags = P2P_ACK; slpmsg->header->ack_id = header->id; - slpmsg->ack_sub_id = header->ack_id; + slpmsg->header->ack_sub_id = header->ack_id; slpmsg->ack_size = header->total_size; slpmsg->info = "SLP ACK";