Index: obj_line_draw.h
===================================================================
--- obj_line_draw.h	(revision 4631)
+++ obj_line_draw.h	(revision 4632)
@@ -25,8 +25,13 @@
  */
 
 /*** Standard draw of lines ***/
+
+/* Include rtree.h for this */
+#ifdef PCB_RTREE_H
+r_dir_t draw_line_callback(const BoxType * b, void *cl);
+#endif
+
 void _draw_line(LineType * line);
 void draw_line(LayerType * layer, LineType * line);
-r_dir_t draw_line_callback(const BoxType * b, void *cl);
 void EraseLine(LineTypePtr Line);
 void DrawLine(LayerTypePtr Layer, LineTypePtr Line);