diff --git a/addons/barcodes/models/barcodes.py b/addons/barcodes/models/barcodes.py
index 4678ab39b4e..1d2ba68fb20 100644
--- a/addons/barcodes/models/barcodes.py
+++ b/addons/barcodes/models/barcodes.py
@@ -195,10 +195,10 @@ class BarcodeRule(models.Model):
             findall = re.findall("[{]|[}]", p) # p does not contain escaped { or }
             if len(findall) == 2:
                 if not re.search("[{][N]*[D]*[}]", p):
-                    raise ValidationError(_("There is a syntax error in the barcode pattern %(pattern)s: braces can only contain N's followed by D's.", rule.pattern))
+                    raise ValidationError(_("There is a syntax error in the barcode pattern %(pattern)s: braces can only contain N's followed by D's.", pattern=rule.pattern))
                 elif re.search("[{][}]", p):
-                    raise ValidationError(_("There is a syntax error in the barcode pattern %(pattern)s: empty braces.", rule.pattern))
+                    raise ValidationError(_("There is a syntax error in the barcode pattern %(pattern)s: empty braces.", pattern=rule.pattern))
             elif len(findall) != 0:
-                raise ValidationError(_("There is a syntax error in the barcode pattern %(pattern)s: a rule can only contain one pair of braces.", rule.pattern))
+                raise ValidationError(_("There is a syntax error in the barcode pattern %(pattern)s: a rule can only contain one pair of braces.", pattern=rule.pattern))
             elif p == '*':
                 raise ValidationError(_(" '*' is not a valid Regex Barcode Pattern. Did you mean '.*' ?"))