diff --git a/make-includes/standard_rules.make b/make-includes/standard_rules.make
index f5bcfbd..b53eafb 100644
--- a/make-includes/standard_rules.make
+++ b/make-includes/standard_rules.make
@@ -257,6 +257,13 @@
 %-web.png: %.png
 	$(CP) $< $(IMGDIR)/$@
 #
+# PDF from PDF (change the name).
+# Only need a print rule for this one, as the web version is handled by the
+# PDF to PNG rules above.
+#
+%-print.pdf: %.pdf
+	$(CP) $< $(IMGDIR)/$@
+#
 # CSS from Sass (both syntaxes).
 #
 %.css: %.sass