diff --git a/aspnetcore/diagnostics/asp0004.md b/aspnetcore/diagnostics/asp0004.md
index 36fc6855a1..2ec6e0d003 100644
--- a/aspnetcore/diagnostics/asp0004.md
+++ b/aspnetcore/diagnostics/asp0004.md
@@ -38,4 +38,4 @@ app.MapGet("/todos/{id}", (int id) => Results.Json(new Todo { .. }));
 
 ## When to suppress warnings
 
-Do ***not*** suppress a warning from this rule. Misplaced attributes can result in unexpected behavior at runtime.
+Do ***not*** suppress a warning from this rule. Returning an `IActionResult` that doesn't implement `IResult` results in serializing the result instance rather than executing the result.