diff --git a/autogen.sh b/autogen.sh
index 0006de8..9b9f7e7 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -9,6 +9,9 @@ cd "$srcdir"
 autoreconf -v --install || exit 1
 cd "$ORIGDIR" || exit $?
 
+git config --local --get format.subjectPrefix >/dev/null 2>&1 ||
+    git config --local format.subjectPrefix "PATCH xf86-video-dummy"
+
 if test -z "$NOCONFIGURE"; then
     exec "$srcdir"/configure "$@"
 fi