Index: obj_arc_op.h
===================================================================
--- obj_arc_op.h	(revision 10750)
+++ obj_arc_op.h	(revision 10751)
@@ -46,6 +46,7 @@
 void *pcb_arcop_remove_point(pcb_opctx_t *ctx, pcb_layer_t *l, pcb_arc_t *a, int *end_id);
 void *pcb_arcop_rotate90(pcb_opctx_t *ctx, pcb_layer_t *Layer, pcb_arc_t *Arc);
 void *pcb_arcop_change_flag(pcb_opctx_t *ctx, pcb_layer_t *Layer, pcb_arc_t *Arc);
+void *pcb_arcop_invalidate_label(pcb_opctx_t *ctx, pcb_arc_t *arc);
 
 
 void *pcb_arc_insert_point(pcb_opctx_t *ctx, pcb_layer_t *Layer, pcb_arc_t *arc);