Index: layer_vis.h
===================================================================
--- layer_vis.h	(revision 28066)
+++ layer_vis.h	(revision 28067)
@@ -36,7 +36,7 @@
 
 /* changes the visibility of all layers in a group; returns the number of
    changed layers; on should be 0 or 1 for setting the state or -1 for toggling it */
-int pcb_layervis_change_group_vis(pcb_layer_id_t Layer, int On, pcb_bool ChangeStackOrder);
+int pcb_layervis_change_group_vis(pcb_hidlib_t *hl, pcb_layer_id_t Layer, int On, pcb_bool ChangeStackOrder);
 
 /* resets the layer visibility stack setting */
 void pcb_layervis_reset_stack(void);