--- a/network_client.c	Tue Dec 14 21:56:01 2004 +0000
+++ b/network_client.c	Wed Dec 15 00:31:08 2004 +0000
@@ -43,6 +43,8 @@
 	NetworkSend_Packet(p, MY_CLIENT);
 }
 
+extern const char _openttd_revision[];
+
 DEF_CLIENT_SEND_COMMAND(PACKET_CLIENT_JOIN)
 {
 	//