diff --git a/src/shrpx_http2_session.cc b/src/shrpx_http2_session.cc
index f68e4d27..6f7bf5f5 100644
--- a/src/shrpx_http2_session.cc
+++ b/src/shrpx_http2_session.cc
@@ -226,8 +226,7 @@ int Http2Session::initiate_connection() {
       return -1;
     }
 
-    rv = connect(conn_.fd, const_cast<sockaddr *>(
-                               &get_config()->downstream_http_proxy_addr.sa),
+    rv = connect(conn_.fd, &get_config()->downstream_http_proxy_addr.sa,
                  get_config()->downstream_http_proxy_addrlen);
     if (rv != 0 && errno != EINPROGRESS) {
       SSLOG(ERROR, this) << "Failed to connect to the proxy "
diff --git a/src/shrpx_http_downstream_connection.cc b/src/shrpx_http_downstream_connection.cc
index b664b8d3..6f123dea 100644
--- a/src/shrpx_http_downstream_connection.cc
+++ b/src/shrpx_http_downstream_connection.cc
@@ -161,8 +161,7 @@ int HttpDownstreamConnection::attach_downstream(Downstream *downstream) {
       }
 
       int rv;
-      rv = connect(conn_.fd, const_cast<sockaddr *>(
-                                 &get_config()->downstream_addrs[i].addr.sa),
+      rv = connect(conn_.fd, &get_config()->downstream_addrs[i].addr.sa,
                    get_config()->downstream_addrs[i].addrlen);
       if (rv != 0 && errno != EINPROGRESS) {
         auto error = errno;