Index: gerber.c
===================================================================
--- gerber.c	(revision 36988)
+++ gerber.c	(revision 36989)
@@ -1064,7 +1064,7 @@
 {
 }
 
-static void gerber_session_begin(rnd_hidlib_t *hidlib, void *user_data, int argc, rnd_event_arg_t argv[])
+static void gerber_session_begin(rnd_design_t *hidlib, void *user_data, int argc, rnd_event_arg_t argv[])
 {
 	gerber_global_aperture_cnt = 0;
 }