diff --git a/app/src/main/sqldelight/data/categories.sq b/app/src/main/sqldelight/data/categories.sq
index 301e77513..e40a4707f 100644
--- a/app/src/main/sqldelight/data/categories.sq
+++ b/app/src/main/sqldelight/data/categories.sq
@@ -30,7 +30,7 @@ WHERE MC.manga_id = :mangaId;
 
 insert:
 INSERT INTO categories(name, sort, flags, manga_order)
-VALUES (:name, :order, :flags, NULL);
+VALUES (:name, :order, :flags, "");
 
 delete:
 DELETE FROM categories