--- a/dom/media/AudioSegment.h
+++ b/dom/media/AudioSegment.h
@@ -13,19 +13,30 @@
 #include "WebAudioUtils.h"
 #ifdef MOZILLA_INTERNAL_API
 #include "mozilla/TimeStamp.h"
 #endif
 #include <float.h>
 
 namespace mozilla {
   struct AudioChunk;
+  class AudioSegment;
 }
 DECLARE_USE_COPY_CONSTRUCTORS(mozilla::AudioChunk)
 
+/**
+ * This allows compilation of nsTArray<AudioSegment> and
+ * AutoTArray<AudioSegment> since without it, static analysis fails on the
+ * mChunks member being a non-memmovable AutoTArray.
+ *
+ * Note that AudioSegment(const AudioSegment&) is deleted, so this should
+ * never come into effect.
+ */
+DECLARE_USE_COPY_CONSTRUCTORS(mozilla::AudioSegment)
+
 namespace mozilla {
 
 template<typename T>
 class SharedChannelArrayBuffer : public ThreadSharedObject {
 public:
   explicit SharedChannelArrayBuffer(nsTArray<nsTArray<T> >* aBuffers)
   {
     mBuffers.SwapElements(*aBuffers);