diff --git a/couchpotato/model.py b/couchpotato/model.py
index 1d166143..2b02c3b0 100644
--- a/couchpotato/model.py
+++ b/couchpotato/model.py
@@ -35,7 +35,7 @@ class File(Entity):
     part = Field(Integer)
     release = ManyToOne('Release')
     # Let's remember the size so we know about offline media.
-    size = Field(Integer)
+    size = Field(Integer, nullable=False)
     type = ManyToOne('FileType')