diff --git a/lib/Makefile.am b/lib/Makefile.am
index 3f717f1..19177cc 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -102,6 +102,9 @@
 
 # All of the libs that don't use Automake need to go in here
 # so they will end up in our release tarballs.
+distdir:
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
 EXTRA_DIST = \
 	d \
 	dart \