--- httpd-2.4.25/modules/proxy/mod_proxy_hcheck.c  2017-03-31 16:37:20.931619893 +0200
+++ httpd-2.4.25_patched/modules/proxy/mod_proxy_hcheck.c   2017-03-31 16:35:11.725088283 +0200
@@ -104,6 +104,7 @@
                                     void *v)
 {
     int ival;
+    apr_interval_time_t timeout;
     hc_template_t *temp;
     sctx_t *ctx = (sctx_t *) ap_get_module_config(s->module_config,
                                                   &proxy_hcheck_module);
@@ -165,6 +166,17 @@
             temp->interval = apr_time_from_sec(ival);
         }
     }
+    else if (!strcasecmp(key, "hcconnectiontimeout")) {
+        /* Request timeout in given unit (default is second).
+         * Defaults to connection timeout
+         */
+        if (ap_timeout_parameter_parse(val, &timeout, "s") != APR_SUCCESS)
+            return "Connectiontimeout has wrong format";
+        if (timeout < 1000)
+            return "Connectiontimeout must be at least one millisecond.";
+        worker->s->conn_timeout = timeout;
+        worker->s->conn_timeout_set = 1;
+    }
     else if (!strcasecmp(key, "hcpasses")) {
         ival = atoi(val);
         if (ival < 0)
@@ -473,6 +485,8 @@
         ap_proxy_initialize_worker(hc, ctx->s, ctx->p);
         hc->s->is_address_reusable = worker->s->is_address_reusable;
         hc->s->disablereuse = worker->s->disablereuse;
+        hc->s->conn_timeout = worker->s->conn_timeout;
+        hc->s->conn_timeout_set = 1;
         hc->s->method = worker->s->method;
         rv = apr_uri_parse(p, url, &uri);
         if (rv == APR_SUCCESS) {