diff --git a/src/bts.cpp b/src/bts.cpp
index 9886cf6..d027993 100644
--- a/src/bts.cpp
+++ b/src/bts.cpp
@@ -748,6 +748,12 @@
 		return;
 	}
 	tbf->update_tlli(tlli);
+
+	if (tbf->new_tbf())
+		tbf->new_tbf()->update_ms(tlli);
+	else
+		tbf->update_ms(tlli);
+
 	LOGP(DRLCMAC, LOGL_DEBUG, "RX: [PCU <- BTS] %s Packet Control Ack\n", tbf_name(tbf));
 	tbf->poll_state = GPRS_RLCMAC_POLL_NONE;