diff --git a/doc/reference/Makefile.am b/doc/reference/Makefile.am
index c136c4721..9c93f95fe 100644
--- a/doc/reference/Makefile.am
+++ b/doc/reference/Makefile.am
@@ -1 +1 @@
-SUBDIRS = clutter cogl
+SUBDIRS = cogl clutter