diff --git a/statement.py b/statement.py
index 5fa3210..544c403 100644
--- a/statement.py
+++ b/statement.py
@@ -373,9 +373,6 @@ class StatementLine(ModelView):
         return Transaction().context.get('company')    
 
 
-    def get_mismatch(self, name):
-        return 0
-
     @fields.depends('end_balance', 'real_cash', 'mismatch')
     def on_change_real_cash(self):
         self.mismatch = self.real_cash - self.end_balance