--- a/Makefile	Tue Sep 06 16:14:37 2005 +0000
+++ b/Makefile	Wed Sep 07 15:10:11 2005 +0000
@@ -681,6 +681,8 @@
 C_SOURCES += video/dedicated_v.c
 C_SOURCES += video/null_v.c
 
+# AI related files
+C_SOURCES += ai/ai.c
 C_SOURCES += ai/default/default.c
 C_SOURCES += ai/trolly/trolly.c
 C_SOURCES += ai/trolly/build.c