diff --git a/gennghttpxfun.py b/gennghttpxfun.py
index 043e9426..1d9dc846 100755
--- a/gennghttpxfun.py
+++ b/gennghttpxfun.py
@@ -115,7 +115,6 @@ OPTIONS = [
     "max-header-fields",
     "no-http2-cipher-black-list",
     "backend-http1-tls",
-    "backend-tls-session-cache-per-worker",
     "tls-session-cache-memcached-cert-file",
     "tls-session-cache-memcached-private-key-file",
     "tls-session-cache-memcached-address-family",
diff --git a/src/shrpx.cc b/src/shrpx.cc
index f84f10ea..cd00e635 100644
--- a/src/shrpx.cc
+++ b/src/shrpx.cc
@@ -1077,7 +1077,6 @@ void fill_default_config() {
   }
 
   tlsconf.session_timeout = std::chrono::hours(12);
-  tlsconf.downstream_session_cache_per_worker = 10000;
 
   auto &httpconf = mod_config()->http;
   httpconf.server_name = "nghttpx nghttp2/" NGHTTP2_VERSION;
@@ -1629,11 +1628,6 @@ SSL/TLS:
               Allow black  listed cipher  suite on  HTTP/2 connection.
               See  https://tools.ietf.org/html/rfc7540#appendix-A  for
               the complete HTTP/2 cipher suites black list.
-  --backend-tls-session-cache-per-worker=<N>
-              Set  the maximum  number  of backend  TLS session  cache
-              stored per worker.
-              Default: )"
-      << get_config()->tls.downstream_session_cache_per_worker << R"(
 
 HTTP/2 and SPDY:
   -c, --http2-max-concurrent-streams=<N>
@@ -2451,8 +2445,6 @@ int main(int argc, char **argv) {
         {SHRPX_OPT_REQUEST_HEADER_FIELD_BUFFER, required_argument, &flag, 104},
         {SHRPX_OPT_MAX_REQUEST_HEADER_FIELDS, required_argument, &flag, 105},
         {SHRPX_OPT_BACKEND_HTTP1_TLS, no_argument, &flag, 106},
-        {SHRPX_OPT_BACKEND_TLS_SESSION_CACHE_PER_WORKER, required_argument,
-         &flag, 107},
         {SHRPX_OPT_TLS_SESSION_CACHE_MEMCACHED_TLS, no_argument, &flag, 108},
         {SHRPX_OPT_TLS_SESSION_CACHE_MEMCACHED_CERT_FILE, required_argument,
          &flag, 109},
@@ -2921,11 +2913,6 @@ int main(int argc, char **argv) {
         // --backend-http1-tls
         cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_HTTP1_TLS, "yes");
         break;
-      case 107:
-        // --backend-tls-session-cache-per-worker
-        cmdcfgs.emplace_back(SHRPX_OPT_BACKEND_TLS_SESSION_CACHE_PER_WORKER,
-                             optarg);
-        break;
       case 108:
         // --tls-session-cache-memcached-tls
         cmdcfgs.emplace_back(SHRPX_OPT_TLS_SESSION_CACHE_MEMCACHED_TLS, "yes");
diff --git a/src/shrpx_config.cc b/src/shrpx_config.cc
index 4d95ffe2..f61788b7 100644
--- a/src/shrpx_config.cc
+++ b/src/shrpx_config.cc
@@ -668,7 +668,6 @@ enum {
   SHRPX_OPTID_BACKEND_READ_TIMEOUT,
   SHRPX_OPTID_BACKEND_REQUEST_BUFFER,
   SHRPX_OPTID_BACKEND_RESPONSE_BUFFER,
-  SHRPX_OPTID_BACKEND_TLS_SESSION_CACHE_PER_WORKER,
   SHRPX_OPTID_BACKEND_TLS_SNI_FIELD,
   SHRPX_OPTID_BACKEND_WRITE_TIMEOUT,
   SHRPX_OPTID_BACKLOG,
@@ -1394,9 +1393,6 @@ int option_lookup_token(const char *name, size_t namelen) {
       if (util::strieq_l("backend-http2-connections-per-worke", name, 35)) {
         return SHRPX_OPTID_BACKEND_HTTP2_CONNECTIONS_PER_WORKER;
       }
-      if (util::strieq_l("backend-tls-session-cache-per-worke", name, 35)) {
-        return SHRPX_OPTID_BACKEND_TLS_SESSION_CACHE_PER_WORKER;
-      }
       break;
     case 's':
       if (util::strieq_l("backend-http2-connection-window-bit", name, 35)) {
@@ -2285,9 +2281,6 @@ int parse_config(const char *opt, const char *optarg,
     mod_config()->conn.downstream.http1_tls = util::strieq(optarg, "yes");
 
     return 0;
-  case SHRPX_OPTID_BACKEND_TLS_SESSION_CACHE_PER_WORKER:
-    return parse_uint(&mod_config()->tls.downstream_session_cache_per_worker,
-                      opt, optarg);
   case SHRPX_OPTID_TLS_SESSION_CACHE_MEMCACHED_TLS:
     mod_config()->tls.session_cache.memcached.tls = util::strieq(optarg, "yes");
 
diff --git a/src/shrpx_config.h b/src/shrpx_config.h
index 1a760d9e..aba62253 100644
--- a/src/shrpx_config.h
+++ b/src/shrpx_config.h
@@ -210,8 +210,6 @@ constexpr char SHRPX_OPT_MAX_RESPONSE_HEADER_FIELDS[] =
 constexpr char SHRPX_OPT_NO_HTTP2_CIPHER_BLACK_LIST[] =
     "no-http2-cipher-black-list";
 constexpr char SHRPX_OPT_BACKEND_HTTP1_TLS[] = "backend-http1-tls";
-constexpr char SHRPX_OPT_BACKEND_TLS_SESSION_CACHE_PER_WORKER[] =
-    "backend-tls-session-cache-per-worker";
 constexpr char SHRPX_OPT_TLS_SESSION_CACHE_MEMCACHED_TLS[] =
     "tls-session-cache-memcached-tls";
 constexpr char SHRPX_OPT_TLS_SESSION_CACHE_MEMCACHED_CERT_FILE[] =
@@ -420,7 +418,6 @@ struct TLSConfig {
   std::vector<std::string> npn_list;
   // list of supported SSL/TLS protocol strings.
   std::vector<std::string> tls_proto_list;
-  size_t downstream_session_cache_per_worker;
   // Bit mask to disable SSL/TLS protocol versions.  This will be
   // passed to SSL_CTX_set_options().
   long int tls_proto_mask;