diff --git a/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.cpp b/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.cpp
index c67ba90be4..77f8d5a55b 100644
--- a/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.cpp
+++ b/modules/juce_audio_devices/audio_io/juce_AudioDeviceManager.cpp
@@ -83,6 +83,8 @@ private:
     }
 
     AudioDeviceManager& owner;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CallbackHandler);
 };