diff --git a/src/dsp/firmware_update.c b/src/dsp/firmware_update.c
index 534d068..a52fdf6 100644
--- a/src/dsp/firmware_update.c
+++ b/src/dsp/firmware_update.c
@@ -1392,13 +1392,6 @@
 		return -EINVAL;
 	}
 
-	rc = pldm_msgbuf_init_errno(
-		buf, PLDM_GET_DOWNSTREAM_FIRMWARE_PARAMETERS_REQ_BYTES,
-		msg->payload, payload_length);
-	if (rc < 0) {
-		return rc;
-	}
-
 	if (!is_transfer_operation_flag_valid(
 		    (enum transfer_op_flag)
 			    params_req->transfer_operation_flag)) {
@@ -1415,6 +1408,13 @@
 		return rc;
 	}
 
+	rc = pldm_msgbuf_init_errno(
+		buf, PLDM_GET_DOWNSTREAM_FIRMWARE_PARAMETERS_REQ_BYTES,
+		msg->payload, payload_length);
+	if (rc < 0) {
+		return rc;
+	}
+
 	pldm_msgbuf_insert(buf, params_req->data_transfer_handle);
 	// Data correctness has been verified, cast it to 1-byte data directly.
 	pldm_msgbuf_insert(buf, params_req->transfer_operation_flag);