diff --git a/docs/Makefile b/docs/Makefile
index ca0eb1f5a8c2c4c1cc0f06ee80fa26023d199bc1..cddcd4c272678f3fa1efd40adecc8d1353181dd9 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -1,6 +1,6 @@
 TOP = ..
 include $(TOP)/mk/boilerplate.mk
 
-SGML_DOC = building
+SGML_DOC = building docbook-cheat-sheet
 
 include $(TOP)/mk/target.mk