README.md
diff --git a/doxybuild.py b/doxybuild.py
index 0b61c39..9c49df2 100644
--- a/doxybuild.py
+++ b/doxybuild.py
@@ -126,7 +126,7 @@
         print('Generating doc tarball to', tarball_path)
         tarball_sources = [
             output_dir,
-            'README.txt',
+            'README.md',
             'LICENSE',
             'NEWS.txt',
             'version'