--- orig/src/VBox/Devices/Graphics/DevVGA.h  (revision 82816)
+++ fixed/src/VBox/Devices/Graphics/DevVGA.h  (working copy)
@@ -277,6 +277,8 @@
 # if defined(VBOX_WITH_HGSMI) && (defined(VBOX_WITH_VIDEOHWACCEL) || defined(VBOX_WITH_CRHGSMI))
     /** LUN\#0: VBVA callbacks interface */
     PDMIDISPLAYVBVACALLBACKS    IVBVACallbacks;
+# elif HC_ARCH_BITS == 32
+    uint32_t                    Padding0;
 # endif
     /** Pointer to base interface of the driver. */
     R3PTRTYPE(PPDMIBASE)        pDrvBase;