diff --git a/modules/juce_audio_basics/synthesisers/juce_Synthesiser.cpp b/modules/juce_audio_basics/synthesisers/juce_Synthesiser.cpp
index 38c51e1a68..879a901165 100644
--- a/modules/juce_audio_basics/synthesisers/juce_Synthesiser.cpp
+++ b/modules/juce_audio_basics/synthesisers/juce_Synthesiser.cpp
@@ -78,9 +78,9 @@ void SynthesiserVoice::renderNextBlock (AudioBuffer<double>& outputBuffer,
                                    outputBuffer.getNumChannels(),
                                    startSample, numSamples);
 
-    tempBuffer.makeCopyOf (subBuffer);
+    tempBuffer.makeCopyOf (subBuffer, true);
     renderNextBlock (tempBuffer, 0, numSamples);
-    subBuffer.makeCopyOf (tempBuffer);
+    subBuffer.makeCopyOf (tempBuffer, true);
 }
 
 //==============================================================================
diff --git a/modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp b/modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp
index 74f4db4a88..53612b60b9 100644
--- a/modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp
+++ b/modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp
@@ -293,9 +293,9 @@ struct ProcessBufferOp   : public AudioGraphRenderingOp<ProcessBufferOp>
             // precision then we need to convert between buffer formats. Note, that
             // this will only happen if the processor does not support double
             // precision processing.
-            tempBuffer.makeCopyOf (buffer);
+            tempBuffer.makeCopyOf (buffer, true);
             processor->processBlock (tempBuffer, midiMessages);
-            buffer.makeCopyOf (tempBuffer);
+            buffer.makeCopyOf (tempBuffer, true);
         }
     }
 
diff --git a/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp b/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp
index 3455df5ca7..caf10c36d1 100644
--- a/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp
+++ b/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp
@@ -156,9 +156,9 @@ void AudioProcessorPlayer::audioDeviceIOCallback (const float** const inputChann
             {
                 if (processor->isUsingDoublePrecision())
                 {
-                    conversionBuffer.makeCopyOf (buffer);
+                    conversionBuffer.makeCopyOf (buffer, true);
                     processor->processBlock (conversionBuffer, incomingMidi);
-                    buffer.makeCopyOf (conversionBuffer);
+                    buffer.makeCopyOf (conversionBuffer, true);
                 }
                 else
                 {