diff --git a/proxygen/httpserver/HTTPServerOptions.h b/proxygen/httpserver/HTTPServerOptions.h
index 16c54e21b..bae2a8637 100644
--- a/proxygen/httpserver/HTTPServerOptions.h
+++ b/proxygen/httpserver/HTTPServerOptions.h
@@ -168,11 +168,6 @@ class HTTPServerOptions {
   std::function<int32_t(const HTTPMessage&)>
       zstdContentCompressionLevelSelector;
 
-  /**
-   * Enable support for pub-sub extension.
-   */
-  bool enableExHeaders{false};
-
   /**
    * Content types to compress, all entries as lowercase
    */