diff --git a/tldp/driver.py b/tldp/driver.py
index 424ec92..a1f552e 100644
--- a/tldp/driver.py
+++ b/tldp/driver.py
@@ -201,8 +201,11 @@ def run(argv):
 
     return build(config, docs, inv)
 
-if __name__ == '__main__':
+def main():
     sys.exit(run(sys.argv[1:]))
 
+if __name__ == '__main__':
+    main()
+
 #
 # -- end of file