diff --git a/reactos/drivers/wdm/audio/legacy/wdmaud/interface.h b/reactos/drivers/wdm/audio/legacy/wdmaud/interface.h
index c547c5b2156..e541453fbc6 100644
--- a/reactos/drivers/wdm/audio/legacy/wdmaud/interface.h
+++ b/reactos/drivers/wdm/audio/legacy/wdmaud/interface.h
@@ -39,9 +39,9 @@ typedef struct
     union
     {
         WAVEFORMATEX WaveFormatEx;
-        WAVEOUTCAPS WaveOutCaps;
-        AUXCAPS     AuxCaps;
-        WAVEINCAPS WaveInCaps;
+        WAVEOUTCAPSW WaveOutCaps;
+        AUXCAPSW     AuxCaps;
+        WAVEINCAPSW WaveInCaps;
     }u;
 
 }WDMAUD_DEVICE_INFO, *PWDMAUD_DEVICE_INFO;