diff --git a/electrum/coinchooser.py b/electrum/coinchooser.py
index 4154249fd..9076c2aa8 100644
--- a/electrum/coinchooser.py
+++ b/electrum/coinchooser.py
@@ -103,10 +103,9 @@ def strip_unneeded(bkts: List[Bucket], sufficient_funds) -> List[Bucket]:
 
 class CoinChooserBase(Logger):
 
-    enable_output_value_rounding = False
-
-    def __init__(self):
+    def __init__(self, *, enable_output_value_rounding: bool):
         Logger.__init__(self)
+        self.enable_output_value_rounding = enable_output_value_rounding
 
     def keys(self, coins: Sequence[PartialTxInput]) -> Sequence[str]:
         raise NotImplementedError
@@ -485,6 +484,7 @@ def get_name(config):
 
 def get_coin_chooser(config):
     klass = COIN_CHOOSERS[get_name(config)]
-    coinchooser = klass()
-    coinchooser.enable_output_value_rounding = config.get('coin_chooser_output_rounding', False)
+    coinchooser = klass(
+        enable_output_value_rounding=config.get('coin_chooser_output_rounding', False),
+    )
     return coinchooser