diff --git a/modules/currency/currency.py b/modules/currency/currency.py
index 7418c31293..04b8414a5f 100644
--- a/modules/currency/currency.py
+++ b/modules/currency/currency.py
@@ -61,6 +61,9 @@ class Currency(
             ],
         help="The minimum amount which can be represented in this currency.")
     digits = fields.Integer("Digits", required=True,
+        domain=[
+            ('digits', '>=', 0),
+            ],
         help="The number of digits to display after the decimal separator.")
 
     @classmethod