diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index dc58fef..f605d4d 100644
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -66,6 +66,11 @@
 	os_exit(0);
 }
 
+int misc_init_f(void)
+{
+	return sandbox_early_getopt_check();
+}
+
 static int sandbox_cmdline_cb_help(struct sandbox_state *state, const char *arg)
 {
 	/* just flag to sandbox_early_getopt_check to show usage */