diff --git a/FL/x.H b/FL/x.H
index 110f92d38..4381eb350 100644
--- a/FL/x.H
+++ b/FL/x.H
@@ -84,11 +84,7 @@ extern FL_EXPORT ulong fl_event_time;
 
 // off-screen pixmaps: create, destroy, draw into, copy to window:
 typedef ulong Fl_Offscreen;
-#   define fl_create_offscreen(w,h) \
-  XCreatePixmap(fl_display, \
-	      (Fl_Surface_Device::surface() == Fl_Display_Device::display_device() ? \
-	      fl_window : fl_xid(Fl::first_window()) ) , \
-	      w, h, fl_visual->depth)
+#    define fl_create_offscreen(w,h) XCreatePixmap(fl_display, RootWindow(fl_display, fl_screen), w, h, fl_visual->depth)
 // begin/end are macros that save the old state in local variables:
 #    define fl_begin_offscreen(pixmap) \
   Window _sw=fl_window; fl_window=pixmap; \