Index: obj_subc.h
===================================================================
--- obj_subc.h	(revision 13214)
+++ obj_subc.h	(revision 13215)
@@ -74,7 +74,7 @@
 pcb_bool pcb_selected_subc_change_side(void);
 
 /* Draw a subcircuit for a preview (silk, copper and outline only) */
-void pcb_subc_draw_preview(const pcb_subc_t *sc, pcb_box_t *drawn_area);
+void pcb_subc_draw_preview(const pcb_subc_t *sc, const pcb_box_t *drawn_area);
 
 void XORDrawSubc(pcb_subc_t *sc, pcb_coord_t DX, pcb_coord_t DY);