diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index a21da0f..3f5cb29 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -1195,6 +1195,11 @@
 
             p = ngx_copy(r->uri.data, clcf->name.data, alias);
             ngx_memcpy(p, name, path.len);
+        }
+
+        if (ngx_http_set_exten(r) != NGX_OK) {
+            ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
+            return NGX_OK;
         }
 
         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,