diff --git a/dlls/wineoss.drv/audio.c b/dlls/wineoss.drv/audio.c
index 36f5cd9..52c8d6e 100644
--- a/dlls/winmm/wineoss/audio.c
+++ b/dlls/winmm/wineoss/audio.c
@@ -1387,6 +1387,7 @@ static DWORD wodNotifyClient(WINE_WAVEOUT* wwo, WORD wMsg, DWORD dwParam1, DWORD
     case WOM_OPEN:
     case WOM_CLOSE:
     case WOM_DONE:
+	if (wMsg == WOM_OPEN) return MMSYSERR_NOERROR;
 	if (wwo->wFlags != DCB_NULL &&
 	    !DriverCallback(wwo->waveDesc.dwCallback, wwo->wFlags,
 			    (HDRVR)wwo->waveDesc.hWave, wMsg,