diff --git a/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.cpp b/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.cpp
index 44c679b839..a90817360d 100644
--- a/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.cpp
+++ b/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.cpp
@@ -103,7 +103,7 @@ void MPESynthesiserBase::renderNextBlock (AudioBuffer<floatType>& outputAudio,
     int midiEventPos;
     MidiMessage m;
 
-    const ScopedLock sl (renderAudioLock);
+    const ScopedLock sl (noteStateLock);
 
     while (numSamples > 0)
     {
@@ -147,7 +147,7 @@ void MPESynthesiserBase::setCurrentPlaybackSampleRate (const double newRate)
 {
     if (sampleRate != newRate)
     {
-        const ScopedLock sl (renderAudioLock);
+        const ScopedLock sl (noteStateLock);
         instrument->releaseAllNotes();
         sampleRate = newRate;
     }
diff --git a/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.h b/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.h
index 898b281439..ad49284535 100644
--- a/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.h
+++ b/modules/juce_audio_basics/mpe/juce_MPESynthesiserBase.h
@@ -179,11 +179,10 @@ protected:
     //==============================================================================
     /** @internal */
     ScopedPointer<MPEInstrument> instrument;
-    /** @internal */
-    CriticalSection renderAudioLock;
 
 private:
     //==============================================================================
+    CriticalSection noteStateLock;
     double sampleRate;
     int minimumSubBlockSize;