diff --git a/targets/SIMU/USER/oaisim.c b/targets/SIMU/USER/oaisim.c
index e9fd52bed68e81fe8e48b8a0acbb85191ccc6fb8..65b655ec33e645bf7d25fc5c79322a080381a528 100644
--- a/targets/SIMU/USER/oaisim.c
+++ b/targets/SIMU/USER/oaisim.c
@@ -505,7 +505,9 @@ void *l2l1_task(void *args_p) {
 
       wait_for_slot_isr ();
 
+#if defined(ENABLE_ITTI)
       itti_update_lte_time(frame, slot);
+#endif
 
       last_slot = (slot - 1) % 20;
       if (last_slot < 0)