Index: polygon.c
===================================================================
--- polygon.c	(revision 25192)
+++ polygon.c	(revision 25193)
@@ -73,7 +73,7 @@
 static const char *polygon_cookie = "core polygon";
 
 
-void pcb_poly_layers_chg(void *user_data, int argc, pcb_event_arg_t argv[])
+void pcb_poly_layers_chg(pcb_hidlib_t *hidlib, void *user_data, int argc, pcb_event_arg_t argv[])
 {
 	pcb_layer_t *ly;
 	pcb_data_t *data;