diff --git a/oxdata/poster/models.py b/oxdata/poster/models.py
index 11be8ae..9b87a8c 100644
--- a/oxdata/poster/models.py
+++ b/oxdata/poster/models.py
@@ -29,7 +29,7 @@ def getPosters(movie_id, url_prefix='', limit=lambda x, y: 0.3 < x/y < 1):
         if p.site not in posters:
             posters[p.site] = []
         poster = p.get()
-        if poster and not poster.width or not poster.height:
+        if poster and (not poster.width or not poster.height):
             p.failed = True
             p.status = "invalid image"
             p.image.delete()