Index: layer.c
===================================================================
--- layer.c	(revision 28066)
+++ layer.c	(revision 28067)
@@ -697,7 +697,7 @@
 		g->lid[grp_idx] = new_lid;
 		g->len++;
 		pcb_event(&pcb->hidlib, PCB_EVENT_LAYERS_CHANGED, NULL);
-		pcb_layervis_change_group_vis(new_lid, 1, 1);
+		pcb_layervis_change_group_vis(&pcb->hidlib, new_lid, 1, 1);
 		pcb_event(&pcb->hidlib, PCB_EVENT_LAYERVIS_CHANGED, NULL);
 		at = new_lid;
 	}