diff --git a/muparser.spec b/muparser.spec
index 1c16a24..90994c0 100644
--- a/muparser.spec
+++ b/muparser.spec
@@ -28,6 +28,7 @@ Url:            http://muparser.beltoforion.de/
 #DL-URL:	http://downloads.sf.net/muparser/muparser_v2_2_3.zip
 # quilt does not like zips very much. downloaded and repackaged.
 Source:         %name-%version.tar.xz
+Source9:        prepare-tar.sh
 Patch3:         muparser-optflags.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  autoconf