diff --git a/kgraphviewer.spec b/kgraphviewer.spec
index e09f55d..09a8ed3 100644
--- a/kgraphviewer.spec
+++ b/kgraphviewer.spec
@@ -25,7 +25,7 @@ License:        GPL-2.0 and GPL-2.0+ and LGPL-2.1+ and GPL-3.0
 Group:          Development/Tools/Other
 Url:            https://projects.kde.org/kgraphviewer
 Source0:        ftp://ftp.kde.org/pub/kde/unstable/kgraphviewer/%{version}/src/%{name}-%{version}.tar.xz
-Source1:        old_graphviz.diff
+Patch0:         old_graphviz.diff
 BuildRequires:  boost-devel
 BuildRequires:  graphviz-devel
 BuildRequires:  libkde4-devel