diff --git a/executables/nr-ue.c b/executables/nr-ue.c
index f5ce6cdd4c..f19f6a15b6 100644
--- a/executables/nr-ue.c
+++ b/executables/nr-ue.c
@@ -896,6 +896,7 @@ void *UE_thread(void *arg)
       readFrame(UE, &tmp, true);
   }
 
+  double ntn_init_time_drift = get_nrUE_params()->ntn_init_time_drift;
   int ntn_koffset = 0;
 
   int duration_rx_to_tx = NR_UE_CAPABILITY_SLOT_RX_TO_TX;
@@ -984,8 +985,8 @@ void *UE_thread(void *arg)
       syncInFrame(UE, &sync_timestamp, intialSyncOffset);
       openair0_write_reorder_clear_context(&UE->rfdevice);
       if (get_nrUE_params()->time_sync_I)
-        // ntn_ta_commondrift is in µs/s, max_pos_acc * time_sync_I is in samples/frame
-        UE->max_pos_acc = mac->ntn_ta.ntn_ta_commondrift * 1e-6 * fp->samples_per_frame / get_nrUE_params()->time_sync_I;
+        // ntn_init_time_drift is in µs/s, max_pos_acc * time_sync_I is in samples/frame
+        UE->max_pos_acc = ntn_init_time_drift * 1e-6 * fp->samples_per_frame / get_nrUE_params()->time_sync_I;
       else
         UE->max_pos_acc = 0;
       shiftForNextFrame = -(UE->init_sync_frame + trashed_frames + 2) * UE->max_pos_acc * get_nrUE_params()->time_sync_I; // compensate for the time drift that happened during initial sync
diff --git a/executables/nr-uesoftmodem.h b/executables/nr-uesoftmodem.h
index 90e32d651b..f7e3b42a72 100644
--- a/executables/nr-uesoftmodem.h
+++ b/executables/nr-uesoftmodem.h
@@ -12,6 +12,7 @@
 #define  CONFIG_HLP_MAX_LDPC_ITERATIONS    "Maximum LDPC decoder iterations\n"
 #define  CONFIG_HLP_TIME_SYNC_P            "coefficient for Proportional part of time sync PI controller\n"
 #define  CONFIG_HLP_TIME_SYNC_I            "coefficient for Integrating part of time sync PI controller\n"
+#define  CONFIG_HLP_NTN_INIT_TIME_DRIFT    "Initial NTN DL time drift (feeder link and service link), given in µs/s\n"
 #define  CONFIG_HLP_AUTONOMOUS_TA          "Autonomously update TA based on DL drift (useful if main contribution to DL drift is movement, e.g. LEO satellite)\n"
 #define  CONFIG_HLP_AGC                    "Rx Gain control used for UE\n"
 
@@ -62,6 +63,7 @@
   {"num-ues",                      NULL,                       0,               .iptr=&(NB_UE_INST),                         .defuintval=1,     TYPE_INT,      0}, \
   {"time-sync-P",                  CONFIG_HLP_TIME_SYNC_P,     0,               .dblptr=&(nrUE_params.time_sync_P),          .defdblval=0.5,    TYPE_DOUBLE,   0}, \
   {"time-sync-I",                  CONFIG_HLP_TIME_SYNC_I,     0,               .dblptr=&(nrUE_params.time_sync_I),          .defdblval=0.0,    TYPE_DOUBLE,   0}, \
+  {"ntn-initial-time-drift",       CONFIG_HLP_NTN_INIT_TIME_DRIFT, 0,           .dblptr=&(nrUE_params.ntn_init_time_drift),  .defdblval=0.0,    TYPE_DOUBLE,   0}, \
   {"autonomous-ta",                CONFIG_HLP_AUTONOMOUS_TA,   PARAMFLAG_BOOL,  .iptr=&(nrUE_params.autonomous_ta),          .defintval=0,      TYPE_INT,      0}, \
   {"agc",                          CONFIG_HLP_AGC,             PARAMFLAG_BOOL,  .iptr=&(nrUE_params.agc),                    .defintval=0,      TYPE_INT,      0}, \
 }
@@ -85,6 +87,7 @@ typedef struct {
   int ssb_start_subcarrier;
   double time_sync_P;
   double time_sync_I;
+  double ntn_init_time_drift;
   int autonomous_ta;
   int agc;
   char *usrp_args;