diff --git a/openair2/LAYER2/MAC/eNB_scheduler_primitives.c b/openair2/LAYER2/MAC/eNB_scheduler_primitives.c
index dfa1080e16..b0ddf15097 100644
--- a/openair2/LAYER2/MAC/eNB_scheduler_primitives.c
+++ b/openair2/LAYER2/MAC/eNB_scheduler_primitives.c
@@ -228,7 +228,7 @@ int add_new_ue(module_id_t mod_idP, int cc_idP, rnti_t rntiP) {
     UE_list->active[UE_id]                   = TRUE;
 
     for (j=0;j<8;j++) {
-      UE_list->UE_template[cc_idP][UE_id].oldNDI[j]    = 0;
+      UE_list->UE_template[cc_idP][UE_id].oldNDI[j]    = (j==0)?1:0;   // 1 because first transmission is with format1A (Msg4) for harq_pid 0 
       UE_list->UE_template[cc_idP][UE_id].oldNDI_UL[j] = 0;
     }
     eNB_ulsch_info[mod_idP][UE_id].status = S_UL_WAITING;