Index: hid_helper.c
===================================================================
--- hid_helper.c	(revision 18256)
+++ hid_helper.c	(revision 18257)
@@ -288,7 +288,7 @@
 }
 
 
-pcb_cam_set_layer_group_(pcb_cam_t *cam, pcb_layergrp_id_t group, unsigned int flags)
+int pcb_cam_set_layer_group_(pcb_cam_t *cam, pcb_layergrp_id_t group, unsigned int flags)
 {
 	if (!cam->active)
 		return 0;