--- a/Makefile	Fri Aug 05 08:31:29 2005 +0000
+++ b/Makefile	Fri Aug 05 09:15:41 2005 +0000
@@ -665,6 +665,7 @@
 C_SOURCES += subsidy_gui.c
 C_SOURCES += terraform_gui.c
 C_SOURCES += texteff.c
+C_SOURCES += thread.c
 C_SOURCES += tile.c
 C_SOURCES += town_cmd.c
 C_SOURCES += town_gui.c