diff --git a/sys/boot/common/install.c b/sys/boot/common/install.c
index 36e7c6484dc..e40c228a5ea 100644
--- a/sys/boot/common/install.c
+++ b/sys/boot/common/install.c
@@ -286,7 +286,7 @@ install(char *pkgname)
 	}
 
 	s = (inst_rootfs == NULL) ? "/install.iso" : inst_rootfs;
-	if (file_loadraw(s, "mfs_root") == NULL) {
+	if (file_loadraw(s, "mfs_root", 1) == NULL) {
 		error = errno;
 		command_errmsg = "cannot load root file system";
 		goto fail;