diff --git a/lib/d/Makefile.am b/lib/d/Makefile.am
index 0137217..6f014c8 100644
--- a/lib/d/Makefile.am
+++ b/lib/d/Makefile.am
@@ -192,6 +192,9 @@
 precross: all-local
 	$(MAKE) -C test precross
 
+distdir:
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
 EXTRA_DIST = \
 	src \
 	test \