diff --git a/targets/SIMU/USER/oaisim_functions.h b/targets/SIMU/USER/oaisim_functions.h
index 9592f3a58d..f12b64d590 100644
--- a/targets/SIMU/USER/oaisim_functions.h
+++ b/targets/SIMU/USER/oaisim_functions.h
@@ -36,6 +36,8 @@ void update_otg_UE(int module_id, unsigned int ctime);
 
 void exit_fun(const char* s);
 
+void init_time();
+
 void init_pad();
 
 int init_slot_isr(void);