Index: trunk/src/hid_helper.c
===================================================================
--- trunk/src/hid_helper.c	(revision 18256)
+++ trunk/src/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;
Index: trunk/src/hid_helper.h
===================================================================
--- trunk/src/hid_helper.h	(revision 18256)
+++ trunk/src/hid_helper.h	(revision 18257)
@@ -50,7 +50,7 @@
 
 /* the logics behind pcb_cam_set_layer_group(); returns non-zero if the macro
    should return (and skip the current group) */
-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);
 
 
 #endif