diff --git a/csdr/chain/digimodes.py b/csdr/chain/digimodes.py
index 88e2b528..22143ce3 100644
--- a/csdr/chain/digimodes.py
+++ b/csdr/chain/digimodes.py
@@ -108,7 +108,7 @@ 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)))
 
 
 class RttyDemodulator(SecondaryDemodulator, SecondarySelectorChain):
@@ -130,5 +130,5 @@ class RttyDemodulator(SecondaryDemodulator, SecondarySelectorChain):
         if sampleRate == self.sampleRate:
             return
         self.sampleRate = sampleRate
-        self.replace(1, RttyDecoder(sampleRate, 50, int(self.targetWidth), self.baudRate, self.reverse))
+        self.replace(2, RttyDecoder(sampleRate, 50, int(self.targetWidth), self.baudRate, self.reverse))