diff --git a/source/extensions/filters/http/gzip/config.h b/source/extensions/filters/http/gzip/config.h
index 989352d84f749..b91f55699430c 100644
--- a/source/extensions/filters/http/gzip/config.h
+++ b/source/extensions/filters/http/gzip/config.h
@@ -26,6 +26,8 @@ class GzipFilterFactory
                                     Server::Configuration::FactoryContext& context) override;
 };
 
+DECLARE_FACTORY(GzipFilterFactory);
+
 } // namespace Gzip
 } // namespace HttpFilters
 } // namespace Extensions