diff --git a/libs/strmbase/mediatype.c b/libs/strmbase/mediatype.c
index 33af6f2e636..90c9bd01206 100644
--- a/libs/strmbase/mediatype.c
+++ b/libs/strmbase/mediatype.c
@@ -132,10 +132,10 @@ void strmbase_dump_media_type(const AM_MEDIA_TYPE *mt)
         if (vih->dwInterlaceFlags) TRACE("interlace flags %#lx, ", vih->dwInterlaceFlags);
         if (vih->dwCopyProtectFlags) TRACE("copy-protection flags %#lx, ", vih->dwCopyProtectFlags);
         TRACE("aspect ratio %lu/%lu, ", vih->dwPictAspectRatioX, vih->dwPictAspectRatioY);
-        if (vih->u.dwControlFlags) TRACE("control flags %#lx, ", vih->u.dwControlFlags);
-        if (vih->u.dwControlFlags & AMCONTROL_COLORINFO_PRESENT)
+        if (vih->dwControlFlags) TRACE("control flags %#lx, ", vih->dwControlFlags);
+        if (vih->dwControlFlags & AMCONTROL_COLORINFO_PRESENT)
         {
-            const DXVA_ExtendedFormat *colorimetry = (const DXVA_ExtendedFormat *)&vih->u.dwControlFlags;
+            const DXVA_ExtendedFormat *colorimetry = (const DXVA_ExtendedFormat *)&vih->dwControlFlags;
 
             TRACE("chroma site %#x, range %#x, matrix %#x, lighting %#x, primaries %#x, transfer function %#x, ",
                     colorimetry->VideoChromaSubsampling, colorimetry->NominalRange, colorimetry->VideoTransferMatrix,
diff --git a/libs/strmbase/strmbase_private.h b/libs/strmbase/strmbase_private.h
index 9ac0b24bb1a..cf702a279c2 100644
--- a/libs/strmbase/strmbase_private.h
+++ b/libs/strmbase/strmbase_private.h
@@ -22,8 +22,6 @@
 #define __WINE_STRMBASE_PRIVATE_H
 
 #include <assert.h>
-#define NONAMELESSUNION
-#define NONAMELESSSTRUCT
 #define COBJMACROS
 #include "dshow.h"
 #include "uuids.h"