diff --git a/lib/json/test/Makefile.am b/lib/json/test/Makefile.am
index bb87a52..16bcfae 100644
--- a/lib/json/test/Makefile.am
+++ b/lib/json/test/Makefile.am
@@ -20,6 +20,9 @@
 check:
 	$(ANT) $(ANT_FLAGS) test
 
+distdir:
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
 # Make sure this doesn't fail if ant is not configured.
 clean-local:
 	ANT=$(ANT) ; if test -z "$$ANT" ; then ANT=: ; fi ; \