--- a/src/http/modules/ngx_http_limit_zone_module.c
+++ b/src/http/modules/ngx_http_limit_zone_module.c
@@ -194,31 +194,26 @@ ngx_http_limit_zone_handler(ngx_http_req
 
         /* hash == node->key */
 
-        do {
-            lz = (ngx_http_limit_zone_node_t *) &node->color;
+        lz = (ngx_http_limit_zone_node_t *) &node->color;
 
-            rc = ngx_memn2cmp(vv->data, lz->data, len, (size_t) lz->len);
+        rc = ngx_memn2cmp(vv->data, lz->data, len, (size_t) lz->len);
 
-            if (rc == 0) {
-                if ((ngx_uint_t) lz->conn < lzcf->conn) {
-                    lz->conn++;
-                    goto done;
-                }
-
-                ngx_shmtx_unlock(&shpool->mutex);
-
-                ngx_log_error(lzcf->log_level, r->connection->log, 0,
-                              "limiting connections by zone \"%V\"",
-                              &lzcf->shm_zone->shm.name);
-
-                return NGX_HTTP_SERVICE_UNAVAILABLE;
+        if (rc == 0) {
+            if ((ngx_uint_t) lz->conn < lzcf->conn) {
+                lz->conn++;
+                goto done;
             }
 
-            node = (rc < 0) ? node->left : node->right;
+            ngx_shmtx_unlock(&shpool->mutex);
 
-        } while (node != sentinel && hash == node->key);
+            ngx_log_error(lzcf->log_level, r->connection->log, 0,
+                          "limiting connections by zone \"%V\"",
+                          &lzcf->shm_zone->shm.name);
 
-        break;
+            return NGX_HTTP_SERVICE_UNAVAILABLE;
+        }
+
+        node = (rc < 0) ? node->left : node->right;
     }
 
     n = offsetof(ngx_rbtree_node_t, color)