diff --git a/models/partner.py b/models/partner.py
index dcaa5c3..2fd9f0f 100644
--- a/models/partner.py
+++ b/models/partner.py
@@ -215,7 +215,7 @@ class partner(models.Model):
 
     @api.constrains('phone')
     def _onchange_phone(self):
-        if self.mobile:
+        if self.phone:
             regex = re.compile(r'(^(?:(?:\+|00)33[\s.-]{0,3}(?:\(0\)[\s.-]{0,3})?|0)[1-9](?:(?:[\s.-]?\d{2}){4}|\d{2}(?:[\s.-]?\d{3}){2})$)+')
             
             # 0123456789