diff --git a/xbmc/cores/AudioEngine/Engines/CoreAudio/CoreAudioRingBuffer.h b/xbmc/cores/AudioEngine/Engines/CoreAudio/CoreAudioRingBuffer.h
index a8ab0d6389d65..0c45882c46dd4 100644
--- a/xbmc/cores/AudioEngine/Engines/CoreAudio/CoreAudioRingBuffer.h
+++ b/xbmc/cores/AudioEngine/Engines/CoreAudio/CoreAudioRingBuffer.h
@@ -233,7 +233,7 @@ class CoreAudioRingBuffer {
    */
   unsigned int GetReadSize()
   {
-    return m_iWritten > m_iReadSize ? m_iWritten - m_iRead : 0;
+    return m_iWritten > m_iRead ? m_iWritten - m_iRead : 0;
   }
 
   /**