--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1653,11 +1653,33 @@ ngx_http_find_virtual_server(ngx_http_re
         name.len = len;
         name.data = server;
 
+        len = 0;
+
         sn = vn->regex;
 
         for (i = 0; i < vn->nregex; i++) {
 
-            n = ngx_regex_exec(sn[i].regex, &name, NULL, 0);
+            if (sn[i].captures && r->captures == NULL) {
+
+                len = (NGX_HTTP_MAX_CAPTURES + 1) * 3 * sizeof(int);
+
+                r->captures = ngx_palloc(r->pool, len);
+                if (r->captures == NULL) {
+                    return NGX_ERROR;
+                }
+
+                if (server == buf) {
+                    server = ngx_pnalloc(r->pool, len);
+                    if (server == NULL) {
+                        return NGX_ERROR;
+                    }
+
+                    ngx_memcpy(server, buf, len);
+                    name.data = server;
+                }
+            }
+
+            n = ngx_regex_exec(sn[i].regex, &name, r->captures, len);
 
             if (n == NGX_REGEX_NO_MATCHED) {
                 continue;
@@ -1675,6 +1697,9 @@ ngx_http_find_virtual_server(ngx_http_re
 
             cscf = sn[i].core_srv_conf;
 
+            r->ncaptures = len;
+            r->captures_data = server;
+
             goto found;
         }
     }