diff --git a/src/tbf.cpp b/src/tbf.cpp
index 388f82d..56804c3 100644
--- a/src/tbf.cpp
+++ b/src/tbf.cpp
@@ -470,6 +470,8 @@
 	llist_add(&tbf->list.list, &bts->dl_tbfs);
 	tbf->bts->tbf_dl_created();
 
+	tbf->m_last_dl_poll_fn = -1;
+
 	gettimeofday(&tbf->m_bw.dl_bw_tv, NULL);
 	gettimeofday(&tbf->m_bw.dl_loss_tv, NULL);