diff --git a/srsenb/hdr/upper/pdcp.h b/srsenb/hdr/upper/pdcp.h
index ce6b01ca6..1dc555fee 100644
--- a/srsenb/hdr/upper/pdcp.h
+++ b/srsenb/hdr/upper/pdcp.h
@@ -68,7 +68,7 @@ private:
     uint16_t rnti; 
     srsenb::rlc_interface_pdcp *rlc; 
     // rlc_interface_pdcp
-    void write_sdu(uint32_t lcid,  srslte::byte_buffer_t *sdu);
+    void write_sdu(uint32_t lcid, srslte::byte_buffer_t *sdu, bool blocking);
     bool rb_is_um(uint32_t lcid);
   };
   
diff --git a/srsenb/src/upper/pdcp.cc b/srsenb/src/upper/pdcp.cc
index 7f62477f9..4d242bdc1 100644
--- a/srsenb/src/upper/pdcp.cc
+++ b/srsenb/src/upper/pdcp.cc
@@ -154,9 +154,8 @@ void pdcp::user_interface_gtpu::write_pdu(uint32_t lcid, srslte::byte_buffer_t *
   gtpu->write_pdu(rnti, lcid, pdu);
 }
 
-void pdcp::user_interface_rlc::write_sdu(uint32_t lcid, srslte::byte_buffer_t* sdu)
+void pdcp::user_interface_rlc::write_sdu(uint32_t lcid, srslte::byte_buffer_t* sdu, bool blocking)
 {
-  
   rlc->write_sdu(rnti, lcid, sdu);
 }
 
diff --git a/srsenb/src/upper/rlc.cc b/srsenb/src/upper/rlc.cc
index 293b1c634..aa62ac1e1 100644
--- a/srsenb/src/upper/rlc.cc
+++ b/srsenb/src/upper/rlc.cc
@@ -190,7 +190,7 @@ void rlc::write_sdu(uint16_t rnti, uint32_t lcid, srslte::byte_buffer_t* sdu)
   pthread_rwlock_rdlock(&rwlock);
   if (users.count(rnti)) {
     if(rnti != SRSLTE_MRNTI){
-      users[rnti].rlc->write_sdu_nb(lcid, sdu);
+      users[rnti].rlc->write_sdu(lcid, sdu, false);
       tx_queue   = users[rnti].rlc->get_total_buffer_state(lcid);
     }else {
       users[rnti].rlc->write_sdu_mch(lcid, sdu);
diff --git a/srsue/src/upper/gw.cc b/srsue/src/upper/gw.cc
index 3d91791b2..acf2bb07e 100644
--- a/srsue/src/upper/gw.cc
+++ b/srsue/src/upper/gw.cc
@@ -364,8 +364,7 @@ void gw::run_thread()
           if (pdcp->is_drb_enabled(cfg.lcid)) {
             pdu->set_timestamp();
             ul_tput_bytes += pdu->N_bytes;
-            pdcp->write_sdu(cfg.lcid, pdu);
-
+            pdcp->write_sdu(cfg.lcid, pdu, false);
             do {
               pdu = pool_allocate;
               if (!pdu) {