diff --git a/BUGs b/BUGs
index 3dcedf5..5bd8927 100644
--- a/BUGs
+++ b/BUGs
@@ -11,5 +11,3 @@ BUG-31:     series does not have 'series_num', so a book in 2 series, means he o
             a larger one, and numbering implies the inner (smaller number), and
             outer has explicity overall ordering of books in both series, so
             should be ok?
-
-BUG-34:     possible series list is assuming a NULL sub_book_num is taking up a slot of books in series
diff --git a/series.py b/series.py
index 605f916..3b55d65 100644
--- a/series.py
+++ b/series.py
@@ -49,7 +49,7 @@ def CalcAvgRating(sid):
 
 def ListOfSeriesWithMissingBooks():
     with db.engine.connect() as conn:
-        res=conn.exec_driver_sql( "select id, title, num_books, count from ( select s.id, s.title, s.num_books, count(bsl.book_id) from series s left outer join book_series_link bsl on bsl.series_id=s.id group by s.id) as foo where num_books > count")
+        res=conn.exec_driver_sql( "select id, title, num_books, count from ( select s.id, s.title, s.num_books, count(bsl.book_id) from series s left outer join book_series_link bsl on bsl.series_id=s.id where bsl.book_num is not null group by s.id) as foo where num_books > count")
     tmp=[]
     for row in res:
         tmp.append({'id': row[0], 'title': row[1]})