diff --git a/oxdata/movie/imdbids.py b/oxdata/movie/imdbids.py
index 79d288d..671ea41 100644
--- a/oxdata/movie/imdbids.py
+++ b/oxdata/movie/imdbids.py
@@ -111,7 +111,7 @@ def update_ids(year, month=None, day=None):
         key = '%04d-%02d-%02d' % (year, month, day)
     elif month is not None:
         url = get_month(year, month)
-        key = '%04d-%02d' % (year, mont)
+        key = '%04d-%02d' % (year, month)
     else:
         url = get_year(year)
         key = '%04d' % year