diff --git a/hw/xwin/winshadgdi.c b/hw/xwin/winshadgdi.c
index cf8391413..89207114a 100644
--- a/hw/xwin/winshadgdi.c
+++ b/hw/xwin/winshadgdi.c
@@ -862,7 +862,7 @@ winBltExposedWindowRegionShadowGDI(ScreenPtr pScreen, WindowPtr pWin)
                     ps.rcPaint.top + pWin->borderWidth,
                     SRCCOPY))
             ErrorF("winBltExposedWindowRegionShadowGDI - BitBlt failed: 0x%08x\n",
-                   GetLastError());
+                   (unsigned int)GetLastError());
 
         /* Release DC */
         DeleteDC(hdcPixmap);