diff --git a/src/shrpx_client_handler.cc b/src/shrpx_client_handler.cc
index 979d8683..1dafe4d5 100644
--- a/src/shrpx_client_handler.cc
+++ b/src/shrpx_client_handler.cc
@@ -453,8 +453,9 @@ ClientHandler::ClientHandler(struct ev_loop *loop, int fd, SSL *ssl,
     : ipaddr_(ipaddr), port_(port),
       wlimit_(loop, &wev_, get_config()->write_rate, get_config()->write_burst),
       rlimit_(loop, &rev_, get_config()->read_rate, get_config()->read_burst),
-      loop_(loop), dconn_pool_(dconn_pool), http2session_(nullptr), ssl_(ssl),
-      worker_stat_(worker_stat), last_write_time_(0), warmup_writelen_(0),
+      loop_(loop), dconn_pool_(dconn_pool), http2session_(nullptr),
+      http1_connect_blocker_(nullptr), ssl_(ssl), worker_stat_(worker_stat),
+      last_write_time_(0), warmup_writelen_(0),
       left_connhd_len_(NGHTTP2_CLIENT_CONNECTION_PREFACE_LEN), fd_(fd),
       should_close_after_write_(false), tls_handshake_(false),
       tls_renegotiation_(false) {