diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c
index af5c93d..9972cdd 100644
--- a/openbsc/src/gprs/sgsn_libgtp.c
+++ b/openbsc/src/gprs/sgsn_libgtp.c
@@ -534,6 +534,9 @@
 	rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PKTS_UDATA_OUT]);
 	rate_ctr_add(&mm->ctrg->ctr[GMM_CTR_BYTES_UDATA_OUT], len);
 
+	/* It is easier to have a global count */
+	pdp->cdr_bytes_out += len;
+
 	return sndcp_unitdata_req(msg, &mm->llme->lle[pdp->sapi],
 				  pdp->nsapi, mm);
 }
@@ -569,6 +572,9 @@
 	rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_UDATA_IN]);
 	rate_ctr_add(&mmctx->ctrg->ctr[GMM_CTR_BYTES_UDATA_IN], npdu_len);
 
+	/* It is easier to have a global count */
+	pdp->cdr_bytes_in += npdu_len;
+
 	return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len);
 }