--- a/Makefile	Thu Apr 20 17:04:08 2006 +0000
+++ b/Makefile	Thu Apr 20 20:51:57 2006 +0000
@@ -636,6 +636,7 @@
 SRCS += network_udp.c
 SRCS += newgrf.c
 SRCS += newgrf_engine.c
+SRCS += newgrf_spritegroup.c
 SRCS += newgrf_station.c
 SRCS += news_gui.c
 SRCS += npf.c