diff --git a/src/Ramstack.HtmxToolkit/TagHelpers/HtmxRequestTagHelper.cs b/src/Ramstack.HtmxToolkit/TagHelpers/HtmxRequestTagHelper.cs
index 2d7c175..c0db01d 100644
--- a/src/Ramstack.HtmxToolkit/TagHelpers/HtmxRequestTagHelper.cs
+++ b/src/Ramstack.HtmxToolkit/TagHelpers/HtmxRequestTagHelper.cs
@@ -272,8 +272,7 @@ internal readonly struct HtmxRequestDataPrior(HtmxRequestData data)
         {
             HtmxRequestCredentials.SameOrigin => false,
             HtmxRequestCredentials.Include => true,
-            // TODO: Consider throwing an exception when an HTMX 4-only credentials mode is configured for HTMX 1.9.x or 2.x.
-            // HtmxRequestCredentials.Omit => throw new InvalidOperationException(),
+            // XMLHttpRequest always sends credentials to the same origin, so Omit has no equivalent.
             _ => null
         };