diff --git a/openair2/RRC/LTE/rrc_eNB_S1AP.c b/openair2/RRC/LTE/rrc_eNB_S1AP.c
index 8bca9c1b12a528eabaca885c5aed3d17dc9bb2bc..dabe5b1524638ae853db20df68e8cdea9af3d55c 100644
--- a/openair2/RRC/LTE/rrc_eNB_S1AP.c
+++ b/openair2/RRC/LTE/rrc_eNB_S1AP.c
@@ -918,7 +918,7 @@ rrc_eNB_process_S1AP_DOWNLINK_NAS(
     rrc_data_req (
       &ctxt,
       srb_id,
-      *rrc_eNB_mui++,
+      (*rrc_eNB_mui)++,
       SDU_CONFIRM_NO,
       length,
       buffer,