diff --git a/Makefile b/Makefile
index f16cd9bf..37cba95a 100644
--- a/Makefile
+++ b/Makefile
@@ -22,6 +22,7 @@ SUBDIRS = inst/pre \
 		YStopWatch YStopWatchList YStopWatchQueue YStopWatchThreadList \
 		eloop YApplication \
 		YOsc \
+		util \
 		lib include bin \
 		inst/post