diff --git a/soitool/database.py b/soitool/database.py
index 525b502c51560285334570c4495ca9ec5c022125..8488d85e04b312f2b14e37465e414759bbbec2a4 100644
--- a/soitool/database.py
+++ b/soitool/database.py
@@ -30,7 +30,7 @@ CODEBOOK = (
     "CREATE TABLE Codebook("
     "Word VARCHAR PRIMARY KEY NOT NULL CHECK(length(Word) > 0), "
     "Category VARCHAR, "
-    "Type VARCHAR DEFAULT 'Stor' CHECK(Type='Stor' OR Type='Liten'), "
+    "Type VARCHAR NOT NULL DEFAULT 'Stor' CHECK(Type='Stor' OR Type='Liten'), "
     "Code VARCHAR UNIQUE)"
 )
 CATEGORYWORDS = (