Index: src_plugins/lib_gtk_common/bu_status_line.c
===================================================================
--- src_plugins/lib_gtk_common/bu_status_line.c	(revision 11803)
+++ src_plugins/lib_gtk_common/bu_status_line.c	(revision 11804)
@@ -83,7 +83,7 @@
 {
 	char text[1024];
 	static const pcb_unit_t *unit_mm = NULL, *unit_mil;
-	pcb_unit_t *unit_inv;
+	const pcb_unit_t *unit_inv;
 
 	if (status_line_label == NULL)
 		return;