diff --git a/contrib/Makefile b/contrib/Makefile
index 1f3d3f1185..9cff3cbc10 100644
--- a/contrib/Makefile
+++ b/contrib/Makefile
@@ -44,6 +44,8 @@ SUBDIRS = \
 		tablefunc	\
 		tcn		\
 		test_decoding	\
+		tsm_system_rows \
+		tsm_system_time \
 		tsearch2	\
 		unaccent	\
 		vacuumlo