diff --git a/src/mux_h2.c b/src/mux_h2.c
index 4c8f565..4d56ea6 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -987,6 +987,7 @@
 
 	h2c->proxy = prx;
 	h2c->task = NULL;
+	h2c->wait_event.tasklet = NULL;
 	h2c->idle_start = now_ms;
 	if (tick_isset(h2c->timeout)) {
 		t = task_new(tid_bit);