1 files changed, 1 insertions, 1 deletions
diff --git a/src/multimedia/audio/qaudioinput_win32_p.h b/src/multimedia/audio/qaudioinput_win32_p.h
index 3ce117702..a3525cda2 100644
--- a/src/multimedia/audio/qaudioinput_win32_p.h
+++ b/src/multimedia/audio/qaudioinput_win32_p.h
@@ -139,7 +139,7 @@ private:
 
     QMutex mutex;
     static void QT_WIN_CALLBACK waveInProc( HWAVEIN hWaveIn, UINT uMsg,
-            DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 );
+            DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2 );
 
     WAVEHDR* allocateBlocks(int size, int count);
     void freeBlocks(WAVEHDR* blockArray);