diff --git a/doc/Makefile b/doc/Makefile
index 685a1eb..7fc444f 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -43,9 +43,11 @@ distclean:
 install: $(TARGETS)
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) install) || exit; done
 	./gtkdoc.sh -P "$(DESTDIR)$(PREFIX)" -i -- "gtkdoc/html.stamp"
+	./docbook.sh -P "$(DESTDIR)$(PREFIX)" -i -- "mailer.html"
 
 uninstall:
 	@for i in $(SUBDIRS); do (cd $$i && $(MAKE) uninstall) || exit; done
 	./gtkdoc.sh -P "$(DESTDIR)$(PREFIX)" -u -- "gtkdoc/html.stamp"
+	./docbook.sh -P "$(DESTDIR)$(PREFIX)" -u -- "mailer.html"
 
 .PHONY: all subdirs clean distclean install uninstall
diff --git a/doc/project.conf b/doc/project.conf
index e39f7d8..5668d72 100644
--- a/doc/project.conf
+++ b/doc/project.conf
@@ -32,3 +32,4 @@ depends=mailer.xml
 type=script
 script=./docbook.sh
 depends=mailer.xml
+install=