diff -r a1a29d2f9231 -r 8e296c093662 libpurple/protocols/oscar/oscar.c
--- a/libpurple/protocols/oscar/oscar.c	Tue Oct 09 21:00:59 2007 +0000
+++ b/libpurple/protocols/oscar/oscar.c	Wed Oct 10 23:20:18 2007 +0000
@@ -1128,8 +1128,10 @@
 	aim_clientready(od, conn);
 
 	chatcon = find_oscar_chat_by_conn(gc, conn);
-	chatcon->id = id;
-	chatcon->conv = serv_got_joined_chat(gc, id++, chatcon->show);
+	if (chatcon) {
+		chatcon->id = id;
+		chatcon->conv = serv_got_joined_chat(gc, id++, chatcon->show);
+	}
 }
 
 static void