diff --git a/lib/webmock/http_lib_adapters/httpclient_adapter.rb b/lib/webmock/http_lib_adapters/httpclient_adapter.rb
index 4286831f..590e51ba 100644
--- a/lib/webmock/http_lib_adapters/httpclient_adapter.rb
+++ b/lib/webmock/http_lib_adapters/httpclient_adapter.rb
@@ -157,14 +157,14 @@ def build_webmock_response(httpclient_response, body = nil)
     end
 
     def build_request_signature(req, reuse_existing = false)
-      uri = WebMock::Util::URI.heuristic_parse(req.header.request_uri.to_s)
-      uri.query = WebMock::Util::QueryMapper.values_to_query(req.header.request_query, notation: WebMock::Config.instance.query_values_notation) if req.header.request_query
-      uri.port = req.header.request_uri.port
-
       @request_filter.each do |filter|
         filter.filter_request(req)
       end
 
+      uri = WebMock::Util::URI.heuristic_parse(req.header.request_uri.to_s)
+      uri.query = WebMock::Util::QueryMapper.values_to_query(req.header.request_query, notation: WebMock::Config.instance.query_values_notation) if req.header.request_query
+      uri.port = req.header.request_uri.port
+
       headers = req.header.all.inject({}) do |hdrs, header|
         hdrs[header[0]] ||= []
         hdrs[header[0]] << header[1]