diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..f39eecf
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+.git* export-ignore
+makesrcdist export-ignore
diff --git a/makesrcdist b/makesrcdist
new file mode 100755
index 0000000..8384fd6
--- /dev/null
+++ b/makesrcdist
@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+# makesrcdist - make a source distribution of pdfio.
+#
+
+if test $# != 1; then
+	echo "Usage: ./makesrcdist version"
+	exit 1
+fi
+
+version=$1
+
+echo Creating tag for release...
+git tag -m "Tag $version" v$version
+git push origin v$version
+
+echo Creating pdfio-$version.tar.gz...
+git archive --format tar --prefix=pdfio-$version/ HEAD | gzip -v9 >pdfio-$version.tar.gz
+gpg --detach-sign pdfio-$version.tar.gz