diff --git a/doc/Makefile.am b/doc/Makefile.am
index 3ef76cb1..aec7ffb9 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -30,5 +30,19 @@ html:
 	texi2html -split_node $(srcdir)/$(info_TEXINFOS)
 	mv *.html avrdude-html
 
+# This rule is only need for automake versions prior to 1.7
+ps: avrdude.ps
+
+# The pdf rules are only needed for automake versions prior to 1.7
+
+pdf: avrdude.pdf
+
+avrdude.pdf: $(info_TEXINFOS)
+
+SUFFIXES = .pdf
+
+.texi.pdf:
+	texi2pdf $?
+
 clean-local:
 	rm -rf avrdude-html *.info