diff --git a/src/doc/Makefile.am b/src/doc/Makefile.am
index 4729a55103..b413f3c062 100644
--- a/src/doc/Makefile.am
+++ b/src/doc/Makefile.am
@@ -1,7 +1,7 @@
 
 SUBDIRS = \
-  design \
   xml
+DIST_SUBDIRS = $(SUBDIRS) design
 
 EXTRA_DIST = \
   README \