diff --git a/arch/sandbox/cpu/spl.c b/arch/sandbox/cpu/spl.c
index 106a78ac1c1b02706519717fe66d30994e8e7fbf..4f415c71d63227272db33cb7a761409f9814d8f1 100644
--- a/arch/sandbox/cpu/spl.c
+++ b/arch/sandbox/cpu/spl.c
@@ -12,6 +12,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+/* SPL / TPL init function */
 void board_init_f(ulong flag)
 {
 	struct sandbox_state *state = state_get_current();