diff --git a/Servers/AudioServer/ASMixer.cpp b/Servers/AudioServer/ASMixer.cpp
index 554085c440..2881f1717c 100644
--- a/Servers/AudioServer/ASMixer.cpp
+++ b/Servers/AudioServer/ASMixer.cpp
@@ -33,9 +33,7 @@ void ASMixer::mix()
     for (;;) {
         {
             CLocker lock(m_lock);
-            for (const auto& buf : m_pending_mixing)
-                active_mix_buffers.append(buf);
-            m_pending_mixing.clear();
+            active_mix_buffers.append(move(m_pending_mixing));
         }
 
         // ### use a wakeup of some kind rather than this garbage