diff --git a/src/IdentityServer/Endpoints/Results/AuthorizeResult.cs b/src/IdentityServer/Endpoints/Results/AuthorizeResult.cs
index 1ffb1b974..4155e0c0e 100644
--- a/src/IdentityServer/Endpoints/Results/AuthorizeResult.cs
+++ b/src/IdentityServer/Endpoints/Results/AuthorizeResult.cs
@@ -177,8 +177,8 @@ private string BuildRedirectUri(AuthorizeResponse response)
 
         if (response.IsError && !uri.Contains('#'))
         {
-            // https://tools.ietf.org/html/draft-bradley-oauth-open-redirector-00
-            uri += "#_=_";
+            // https://datatracker.ietf.org/doc/html/draft-ietf-oauth-security-topics-29#section-4.1.3
+            uri += "#_";
         }
 
         return uri;