Index: util/gsch2pcb-rnd/gsch2pcb.c
===================================================================
--- util/gsch2pcb-rnd/gsch2pcb.c	(revision 5842)
+++ util/gsch2pcb-rnd/gsch2pcb.c	(revision 5843)
@@ -327,7 +327,7 @@
 	}
 }
 
-void require_gnetlist_backend(const char *dir, char *backend)
+void require_gnetlist_backend(const char *dir, const char *backend)
 {
 	char *path = pcb_strdup_printf("%s/gnet-%s.scm", dir, backend);
 	if (!pcb_file_readable(path))
Index: util/gsch2pcb-rnd/gsch2pcb.h
===================================================================
--- util/gsch2pcb-rnd/gsch2pcb.h	(revision 5842)
+++ util/gsch2pcb-rnd/gsch2pcb.h	(revision 5843)
@@ -46,5 +46,5 @@
 const char *local_project_pcb_name; /* file name of the design from which the local project file name shall be derived */
 
 char *fix_spaces(char * str);
-void require_gnetlist_backend(const char *dir, char *backend);
+void require_gnetlist_backend(const char *dir, const char *backend);