diff --git a/graphics/x11drv/bitmap.c b/graphics/x11drv/bitmap.c
index d9aa981..9669457 100644
--- a/graphics/x11drv/bitmap.c
+++ b/graphics/x11drv/bitmap.c
@@ -54,6 +54,11 @@
     
     if (!(dc->w.flags & DC_MEMORY)) return 0;
 
+    dc->w.totalExtent.left   = 0;
+    dc->w.totalExtent.top    = 0;
+    dc->w.totalExtent.right  = bmp->bitmap.bmWidth;
+    dc->w.totalExtent.bottom = bmp->bitmap.bmHeight;
+
     if (dc->w.hVisRgn)
        SetRectRgn32( dc->w.hVisRgn, 0, 0,
                      bmp->bitmap.bmWidth, bmp->bitmap.bmHeight );