diff --git a/doc/manual/Makefile.am b/doc/manual/Makefile.am
index fb4be8b8..b313f112 100644
--- a/doc/manual/Makefile.am
+++ b/doc/manual/Makefile.am
@@ -15,6 +15,9 @@ dblatex_opts = \
 dist_html_DATA = manual.html style.css
 dist_pdf_DATA = manual.pdf
 
+# Embed Docbook's callout images in the distribution.
+EXTRA_DIST = images
+
 manual.html: $(DOCBOOK_FILES)
 	if test "$(XSLTPROC)" != ""; then				\
 		$(XSLTPROC) $(xsltproc_opts) --nonet --xinclude		\