diff --git a/lib/wallet.py b/lib/wallet.py
index 176b991a..613d30a3 100644
--- a/lib/wallet.py
+++ b/lib/wallet.py
@@ -896,7 +896,7 @@ class Abstract_Wallet(PrintError):
 
         # Fee estimator
         if fixed_fee is None:
-            fee_estimator = self.config.estimate_fee
+            fee_estimator = config.estimate_fee
         else:
             fee_estimator = lambda size: fixed_fee