Index: obj_arc_draw.h
===================================================================
--- obj_arc_draw.h	(revision 10647)
+++ obj_arc_draw.h	(revision 10648)
@@ -28,7 +28,7 @@
 
 /* Include rtree.h for this */
 #ifdef PCB_RTREE_H
-pcb_r_dir_t draw_arc_callback(const pcb_box_t * b, void *cl);
+pcb_r_dir_t pcb_arc_draw_callback(const pcb_box_t * b, void *cl);
 #endif
 
 void pcb_arc_draw_(pcb_arc_t * arc);