diff --git a/Makefile b/Makefile
index 4142e1b28..6453f3eab 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ PROG := abc
 MODULES := \
 	$(wildcard src/ext*) \
 	src/base/abc src/base/abci src/base/cmd src/base/io src/base/main src/base/exor \
-	src/base/ver src/base/wlc src/base/bac src/base/cba src/base/pla src/base/test \
+	src/base/ver src/base/wlc src/base/acb src/base/bac src/base/cba src/base/pla src/base/test \
 	src/map/mapper src/map/mio src/map/super src/map/if \
 	src/map/amap src/map/cov src/map/scl src/map/mpm \
 	src/misc/extra src/misc/mvc src/misc/st src/misc/util src/misc/nm \