diff --git a/executables/nr-ue.c b/executables/nr-ue.c
index 8ee5414c36..10739d797c 100644
--- a/executables/nr-ue.c
+++ b/executables/nr-ue.c
@@ -666,8 +666,6 @@ void *UE_thread(void *arg) {
   int thread_idx=0;
   notifiedFIFO_t freeBlocks;
   initNotifiedFIFO_nothreadSafe(&freeBlocks);
-  NR_UE_MAC_INST_t *mac = get_mac_inst(0);
-
 
   for (int i=0; i<RX_NB_TH+1; i++)  // RX_NB_TH working + 1 we are making to be pushed
     pushNotifiedFIFO_nothreadSafe(&freeBlocks,
@@ -685,8 +683,7 @@ void *UE_thread(void *arg) {
         syncRunning=false;
         syncData_t *tmp=(syncData_t *)NotifiedFifoData(res);
         // shift the frame index with all the frames we trashed meanwhile we perform the synch search
-        decoded_frame_rx=((((mac->mib->systemFrameNumber.buf[0] >> mac->mib->systemFrameNumber.bits_unused)<<4) | tmp->proc.decoded_frame_rx) +
-                         (!UE->init_sync_frame) + trashed_frames) % MAX_FRAME_NUMBER;
+        decoded_frame_rx=(tmp->proc.decoded_frame_rx + (!UE->init_sync_frame) + trashed_frames) % MAX_FRAME_NUMBER;
         delNotifiedFIFO_elt(res);
       } else {
         readFrame(UE, &timestamp, true);