diff --git a/src/effects/ladspa/LadspaEffect.cpp b/src/effects/ladspa/LadspaEffect.cpp
index e5ab1a8cd..6cebb365c 100644
--- a/src/effects/ladspa/LadspaEffect.cpp
+++ b/src/effects/ladspa/LadspaEffect.cpp
@@ -1010,7 +1010,6 @@ bool LadspaEffect::RealtimeAddProcessor(int numChannels, float sampleRate)
    }
 
    mSlaves.Add(slave);
-   mSlaveChannels.Add(numChannels);
 
    return true;
 }
diff --git a/src/effects/ladspa/LadspaEffect.h b/src/effects/ladspa/LadspaEffect.h
index d43e7134d..4d66c2651 100644
--- a/src/effects/ladspa/LadspaEffect.h
+++ b/src/effects/ladspa/LadspaEffect.h
@@ -175,7 +175,6 @@ private:
 
    // Realtime processing
    LadspaSlaveArray mSlaves;
-   wxArrayInt mSlaveChannels;
 
    EffectUIHostInterface *mUIHost;
    LadspaEffectEventHelper *mEventHelper;