--- tme/machine/sun2/sun2-mainbus.c	2018/04/24 16:43:22	1.1.1.5
+++ tme/machine/sun2/sun2-mainbus.c	2018/04/24 16:45:20	1.1.1.6
@@ -1,4 +1,4 @@
-/* $Id: sun2-mainbus.c,v 1.1.1.5 2018/04/24 16:43:22 root Exp $ */
+/* $Id: sun2-mainbus.c,v 1.1.1.6 2018/04/24 16:45:20 root Exp $ */
 
 /* machine/sun2/sun2-mainbus.c - implementation of Sun 2 emulation: */
 
@@ -34,7 +34,7 @@
  */
 
 #include <tme/common.h>
-_TME_RCSID("$Id: sun2-mainbus.c,v 1.1.1.5 2018/04/24 16:43:22 root Exp $");
+_TME_RCSID("$Id: sun2-mainbus.c,v 1.1.1.6 2018/04/24 16:45:20 root Exp $");
 
 /* includes: */
 #include "sun2-impl.h"
@@ -616,11 +616,11 @@ TME_ELEMENT_NEW_DECL(tme_machine_sun2) {
   /* try to read in the IDPROM: */
   idprom_fp = fopen(idprom_filename, "r");
   if (idprom_fp == NULL) {
-    tme_output_append_error(_output, idprom_filename);
+    tme_output_append_error(_output, "%s", idprom_filename);
     return (errno);
   }
   if (fread(idprom, sizeof(tme_uint8_t), sizeof(idprom), idprom_fp) != sizeof(idprom)) {
-    tme_output_append_error(_output, idprom_filename);
+    tme_output_append_error(_output, "%s", idprom_filename);
     fclose(idprom_fp);
     return (ENOEXEC);
   }