diff --git a/sickbeard/properFinder.py b/sickbeard/properFinder.py
index c37ac1eb..f8f76cd6 100644
--- a/sickbeard/properFinder.py
+++ b/sickbeard/properFinder.py
@@ -182,7 +182,11 @@ class ProperFinder():
                 logger.log(
                     u"Looks like this is an air-by-date or sports show, attempting to convert the date to season/episode",
                     logger.DEBUG)
-                airdate = curProper.airdate.toordinal()
+                if curProper.airdate:
+                    airdate = curProper.airdate.toordinal()
+                else:
+                    airdate = None
+
                 myDB = db.DBConnection()
                 sql_result = myDB.select(
                     "SELECT season, episode FROM tv_episodes WHERE showid = ? and indexer = ? and airdate = ?",