1 files changed, 5 insertions, 4 deletions
diff --git a/src/engine/channels/enginemicrophone.h b/src/engine/channels/enginemicrophone.h
index f3ac6f0b3e..0cca9c294c 100644
--- a/src/engine/channels/enginemicrophone.h
+++ b/src/engine/channels/enginemicrophone.h
@@ -38,16 +38,17 @@ class EngineMicrophone : public EngineChannel, public AudioDestination {
     // the soundcard this AudioDestination was registered for! Beware, in the
     // case of multiple soundcards, this method is not re-entrant but it may be
     // concurrent with EngineMaster processing.
-    virtual void receiveBuffer(AudioInput input, const CSAMPLE* pBuffer,
-                               unsigned int iNumSamples);
+    virtual void receiveBuffer(const AudioInput& input,
+            const CSAMPLE* pBuffer,
+            unsigned int iNumSamples);
 
     // Called by SoundManager whenever the microphone input is connected to a
     // soundcard input.
-    virtual void onInputConfigured(AudioInput input);
+    virtual void onInputConfigured(const AudioInput& input);
 
     // Called by SoundManager whenever the microphone input is disconnected from
     // a soundcard input.
-    virtual void onInputUnconfigured(AudioInput input);
+    virtual void onInputUnconfigured(const AudioInput& input);
 
     bool isSolo();
     double getSoloDamping();