diff -r cc75c76972ee -r c0432d11811c src/multimedia/audio/qaudioinput_win32_p.h
--- a/src/multimedia/audio/qaudioinput_win32_p.h	Wed Apr 21 12:15:23 2010 +0300
+++ b/src/multimedia/audio/qaudioinput_win32_p.h	Wed Apr 21 20:15:53 2010 +0300
@@ -122,6 +122,8 @@
     volatile int waveFreeBlockCount;
     int waveCurrentBlock;
 
+    CRITICAL_SECTION waveInCriticalSection;
+
     static void CALLBACK waveInProc( HWAVEIN hWaveIn, UINT uMsg,
             DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 );