diff --git a/rubygem-rdiscount.spec b/rubygem-rdiscount.spec
index cbbe1d2..e775e09 100644
--- a/rubygem-rdiscount.spec
+++ b/rubygem-rdiscount.spec
@@ -44,35 +44,8 @@ gem spec %{SOURCE0} -l --ruby | sed -e 's|,|,\n|g' > %{gem_name}.gemspec
 sed -i ext/extconf.rb \
 	-e '\@check_sizeof@s| == 4|== size|'
 
-# Remove files in discount-2.1.8
-cat >> discount_files<<EOF
-Csio.c
-amalloc.c
-basename.c
-css.c
-docheader.c
-dumptree.c
-emmatch.c
-flags.c
-generate.c
-github_flavoured.c
-html5.c
-main.c
-makepage.c
-markdown.c
-mkd2html.c
-mkdio.c
-mktags.c
-pgm_options.c
-resource.c
-setup.c
-tags.c
-theme.c
-toc.c
-xml.c
-xmlpage.c
-mkdio.h
-EOF
+# Remove c and header file to not bundle discount-sources
+(cd ext; ls -1 *.c *.h | grep -v rdiscount.c ) > discount_files
 
 cat discount_files | while read f ; do
 	rm -f ext/$f
@@ -164,6 +137,9 @@ popd
 
 
 %changelog
+* Sat Jul 21 2018 Gerd Pokorra <gp@zimt.uni-siegen.de> - 2.2.0.1-2
+- Generate the file discount_files
+
 * Sat Jul 21 2018 Gerd Pokorra <gp@zimt.uni-siegen.de> - 2.2.0.1-1
 - Update to 2.2.0.1
 - Add gcc to BuildRequires