diff --git a/csdr/chain/digimodes.py b/csdr/chain/digimodes.py
index 98937ae0..fdbd0721 100644
--- a/csdr/chain/digimodes.py
+++ b/csdr/chain/digimodes.py
@@ -109,5 +109,5 @@ class CwDemodulator(SecondaryDemodulator, SecondarySelectorChain):
         if sampleRate == self.sampleRate:
             return
         self.sampleRate = sampleRate
-        self.replace(1, CwDecoder(sampleRate, 0, int(self.baudRate)))
+        self.replace(2, CwDecoder(sampleRate, 0, int(self.baudRate)))