diff --git a/src/shrpx_http2_session.cc b/src/shrpx_http2_session.cc
index ba72a2c2..6107276b 100644
--- a/src/shrpx_http2_session.cc
+++ b/src/shrpx_http2_session.cc
@@ -756,10 +756,6 @@ int on_stream_close_callback(nghttp2_session *session, int32_t stream_id,
 } // namespace
 
 void Http2Session::start_settings_timer() {
-  if (ev_is_active(&settings_timer_)) {
-    return;
-  }
-
   ev_timer_again(conn_.loop, &settings_timer_);
 }
 
diff --git a/src/shrpx_http2_upstream.cc b/src/shrpx_http2_upstream.cc
index 6ee1acab..0021c1d3 100644
--- a/src/shrpx_http2_upstream.cc
+++ b/src/shrpx_http2_upstream.cc
@@ -146,9 +146,6 @@ int Http2Upstream::upgrade_upstream(HttpsUpstream *http) {
 }
 
 void Http2Upstream::start_settings_timer() {
-  if (ev_is_active(&settings_timer_)) {
-    return;
-  }
   ev_timer_start(handler_->get_loop(), &settings_timer_);
 }
 
diff --git a/src/shrpx_live_check.cc b/src/shrpx_live_check.cc
index fc2cc4a2..5cb687e0 100644
--- a/src/shrpx_live_check.cc
+++ b/src/shrpx_live_check.cc
@@ -620,10 +620,6 @@ void LiveCheck::on_success() {
 int LiveCheck::noop() { return 0; }
 
 void LiveCheck::start_settings_timer() {
-  if (ev_is_active(&settings_timer_)) {
-    return;
-  }
-
   ev_timer_set(&settings_timer_, 10., 0.);
   ev_timer_start(conn_.loop, &settings_timer_);
 }