diff --git a/core/fs/lib/loadconfig.c b/core/fs/lib/loadconfig.c
index c9652b6..4dfe1b9 100644
--- a/core/fs/lib/loadconfig.c
+++ b/core/fs/lib/loadconfig.c
@@ -10,6 +10,8 @@
  * This searches for extlinux.conf and syslinux.cfg in the install
  * directory, followed by a set of fallback directories.  If found,
  * set the current working directory to match.
+ * isolinux configuration values are added for the case where ISO
+ * content has been duplicated to a disk (typically bootable USB).
  */
 int generic_load_config(void)
 {
@@ -17,12 +19,15 @@ int generic_load_config(void)
 	NULL,			/* CurrentDirName */
 	"/boot/syslinux",
 	"/syslinux",
+	"/boot/isolinux",
+	"/isolinux",
 	"/",
 	NULL
     };
     static const char *filenames[] = {
 	"extlinux.conf",
 	"syslinux.cfg",
+	"isolinux.cfg",
 	NULL
     };