--- a/PyRSS2Gen.py
+++ b/PyRSS2Gen.py
@@ -350,7 +350,7 @@
         ttl = self.ttl
         if isinstance(self.ttl, int):
             ttl = IntElement("ttl", ttl)
-        _opt_element(handler, "tt", ttl)
+        _opt_element(handler, "ttl", ttl)
 
         if self.image is not None:
             self.image.publish(handler)
