diff --git a/miniaudio.h b/miniaudio.h
index 9dc197a1..6c457079 100644
--- a/miniaudio.h
+++ b/miniaudio.h
@@ -20880,6 +20880,8 @@ static HRESULT STDMETHODCALLTYPE ma_IMMNotificationClient_OnDefaultDeviceChanged
     /*ma_log_postf(ma_device_get_log(pThis->pDevice), MA_LOG_LEVEL_DEBUG, "IMMNotificationClient_OnDefaultDeviceChanged(dataFlow=%d, role=%d, pDefaultDeviceID=%S)\n", dataFlow, role, (pDefaultDeviceID != NULL) ? pDefaultDeviceID : L"(NULL)");*/
 #endif
 
+    (void)role;
+
     /* We only care about devices with the same data flow as the current device. */
     if ((pThis->pDevice->type == ma_device_type_playback && dataFlow != ma_eRender)  ||
         (pThis->pDevice->type == ma_device_type_capture  && dataFlow != ma_eCapture) ||