Index: export_stl.c
===================================================================
--- export_stl.c	(revision 34299)
+++ export_stl.c	(revision 34300)
@@ -92,7 +92,7 @@
 
 static rnd_hid_attr_val_t stl_values[NUM_OPTIONS];
 
-static rnd_export_opt_t *stl_get_export_options(rnd_hid_t *hid, int *n)
+static const rnd_export_opt_t *stl_get_export_options(rnd_hid_t *hid, int *n)
 {
 	const char *suffix = ".stl";
 	char **val = &stl_values[HA_stlfile].str;