diff --git a/src/postgres/third-party-extensions/Makefile b/src/postgres/third-party-extensions/Makefile
index a2db1716a0ab..0d67329b65a8 100644
--- a/src/postgres/third-party-extensions/Makefile
+++ b/src/postgres/third-party-extensions/Makefile
@@ -9,6 +9,7 @@ DIRS = \
 	postgresql-hll \
 	pg_partman \
 	wal2json \
+	pgtap \
 
 BUILDDIRS = $(DIRS:%=build-%)
 INSTALLDIRS = $(DIRS:%=install-%)