diff --git boden/grund.cc boden/grund.cc
index 72c4ecedc..0662ef936 100644
--- boden/grund.cc
+++ boden/grund.cc
@@ -1253,7 +1253,7 @@ void grund_t::display_if_visible(sint16 xpos, sint16 ypos, const sint16 raster_t
 {
 	if(  !is_karten_boden_visible()  ) {
 		// only check for forced redraw (of marked ... )
-		if(dirty) {
+		if(get_flag(grund_t::dirty)) {
 			mark_rect_dirty_clip( xpos, ypos + raster_tile_width / 2, xpos + raster_tile_width - 1, ypos + raster_tile_width - 1 CLIP_NUM_PAR );
 		}
 		return;