diff --git a/dlls/dsound/capture.c b/dlls/dsound/capture.c
index f089313027d..174355a22f5 100644
--- a/dlls/dsound/capture.c
+++ b/dlls/dsound/capture.c
@@ -942,7 +942,7 @@ static HRESULT IDirectSoundCaptureBufferImpl_Create(
 		return err;
 	    }
 	} else {
-	    DWORD flags = CALLBACK_FUNCTION;
+	    DWORD flags = CALLBACK_FUNCTION | WAVE_MAPPED;
             err = mmErr(waveInOpen(&(device->hwi),
                 device->drvdesc.dnDevNode, device->pwfx,
                 (DWORD_PTR)DSOUND_capture_callback, (DWORD_PTR)device, flags));
diff --git a/dlls/dsound/primary.c b/dlls/dsound/primary.c
index aa8450f425d..8a87c966646 100644
--- a/dlls/dsound/primary.c
+++ b/dlls/dsound/primary.c
@@ -125,7 +125,7 @@ HRESULT DSOUND_ReopenDevice(DirectSoundDevice *device, BOOL forcewave)
 
 	if (device->drvdesc.dwFlags & DSDDESC_DOMMSYSTEMOPEN)
 	{
-		DWORD flags = CALLBACK_FUNCTION;
+		DWORD flags = CALLBACK_FUNCTION | WAVE_MAPPED;
 
 		if (device->driver)
 			flags |= WAVE_DIRECTSOUND;