diff --git a/lib/Makefile.in b/lib/Makefile.in
index 4608601ee..64c4cd8a5 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -22,6 +22,7 @@ SUBDIRS="ansi \
 	syslib \
 	util \
 	sysutil \
+	sysvipc \
 	timers \
 	$ARCH \
 	ack