diff --git a/autogen.sh b/autogen.sh
index d15c0fb..5756b37 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -24,6 +24,9 @@ fi
 autoreconf -v --install || exit 1
 cd "$ORIGDIR" || exit $?
 
+git config --local --get format.subjectPrefix >/dev/null 2>&1 ||
+    git config --local format.subjectPrefix "PATCH libxcb-errors"
+
 if test -z "$NOCONFIGURE"; then
     exec "$srcdir"/configure "$@"
 fi