diff --git a/lib/ts/Makefile.am b/lib/ts/Makefile.am
index 62ea206..05d71e4 100644
--- a/lib/ts/Makefile.am
+++ b/lib/ts/Makefile.am
@@ -48,6 +48,9 @@
 	$(RM) -r $(distdir)/test/build/
 	$(RM) -r $(distdir)/test/gen-*/
 
+distdir:
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
 EXTRA_DIST = \
     coding_standards.md \
     Gruntfile.js \