diff --git a/doc/Makefile.am b/doc/Makefile.am
index 745b0670..5f9f5212 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -14,6 +14,7 @@ gendocbook_files =				\
 	$(top_srcdir)/api/mpi/docbookwriter.py
 
 script_docbook_sources =			\
+	built/medit-defines.ent			\
 	built/script-python.docbook		\
 	built/script-lua.docbook		\
 	built/script-lua-gtk.docbook