Index: layer_grp.h
===================================================================
--- layer_grp.h	(revision 7736)
+++ layer_grp.h	(revision 7737)
@@ -72,7 +72,7 @@
 
 /* returns a bitfield of pcb_layer_type_t; returns 0 if layer_idx is invalid. */
 unsigned int pcb_layergrp_flags(pcb_board_t *pcb, pcb_layergrp_id_t group_idx);
-const char *pcb_layergrp_name(pcb_layergrp_id_t gid);
+const char *pcb_layergrp_name(pcb_board_t *pcb, pcb_layergrp_id_t gid);
 
 /* Same as pcb_layer_list but lists layer groups. A group is matching
    if any layer in that group matches mask. */