diff --git a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.proto b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.proto
index 83f66781..db1d8347 100644
--- a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.proto
+++ b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.proto
@@ -221,7 +221,6 @@ message HeaderForwardingRules {
 
   // If set, specifically disallow any header in this list to be forwarded to the external
   // processing server. This overrides the above ``allowed_headers`` if a header matches both.
-  // [#not-implemented-hide:]
   type.matcher.v3.ListStringMatcher disallowed_headers = 2;
 }