diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c
index 363ddef..83f801b 100644
--- a/source3/smbd/smb2_server.c
+++ b/source3/smbd/smb2_server.c
@@ -1807,6 +1807,17 @@ static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
 		if (!im) {
 			return NT_STATUS_NO_MEMORY;
 		}
+
+		if (req->do_signing) {
+			NTSTATUS status;
+			status = smb2_signing_sign_pdu(req->session->session_key,
+					       &req->out.vector[i], 3);
+			if (!NT_STATUS_IS_OK(status)) {
+				TALLOC_FREE(im);
+				return status;
+			}
+		}
+
 		tevent_schedule_immediate(im,
 					req->sconn->smb2.event_ctx,
 					smbd_smb2_request_dispatch_immediate,