diff --git a/doc/SW_archi.md b/doc/SW_archi.md
index b186bea524..6ba78ad8f1 100644
--- a/doc/SW_archi.md
+++ b/doc/SW_archi.md
@@ -338,7 +338,7 @@ On the Tx side (downlink in gNB), the entry functions `nr_pdcp_data_req_drb()` a
 
 ## PDCP Rx flow
 
-At the Rx side, `pdcp_data_ind()` serves as the entry point for receiving data from RLC. Within `pdcp_data_ind()`, the PDCP manager mutex protects access to the PDU receiving function of PDCP (`recv_pdu()` callback corresponding to `nr_pdcp_entity_recv_pdu()` for DRBs). Following this, the `deliver_sdu_drb()` function dispatches the received data to the GTP thread via an ITTI message (`GTPV1U_TUNNEL_DATA_REQ`).
+At the Rx side, `pdcp_data_ind()` serves as the entry point for receiving data from RLC. Within `pdcp_data_ind()`, the PDCP manager mutex protects access to the PDU receiving function of PDCP (`recv_pdu()` callback corresponding to `nr_pdcp_entity_recv_pdu()` for DRBs). Following this, the `deliver_sdu_drb()` function dispatches the received data to the SDAP sublayer.
 
 ## PDCP security