diff --git a/lnbits/extensions/watchonly/migrations.py b/lnbits/extensions/watchonly/migrations.py
index 78eaa0ae..8e371a2a 100644
--- a/lnbits/extensions/watchonly/migrations.py
+++ b/lnbits/extensions/watchonly/migrations.py
@@ -60,7 +60,7 @@ async def m003_add_columns_to_wallets(db):
 
     await db.execute("ALTER TABLE watchonly.wallets ADD COLUMN type TEXT;")
     await db.execute(
-        "ALTER TABLE watchonly.wallets ADD COLUMN fingerprint TEXT NOT NULL;"
+        "ALTER TABLE watchonly.wallets ADD COLUMN fingerprint TEXT NOT NULL DEFAULT '';"
     )