diff --git a/README.md b/README.md
index 5af63de029e3..4f3165bcb566 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 ASP.NET Core
-============
+=============
 
 [![.NET Foundation](https://img.shields.io/badge/.NET%20Foundation-blueviolet.svg)](https://www.dotnetfoundation.org/)
 [![MIT License](https://img.shields.io/github/license/dotnet/aspnetcore?color=%230b0&style=flat-square)](https://github.com/dotnet/aspnetcore/blob/main/LICENSE.txt) [![Help Wanted](https://img.shields.io/github/issues/dotnet/aspnetcore/help%20wanted?color=%232EA043&label=help%20wanted&style=flat-square)](https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22) [![Good First Issues](https://img.shields.io/github/issues/dotnet/aspnetcore/good%20first%20issue?color=%23512BD4&label=good%20first%20issue&style=flat-square)](https://github.com/dotnet/aspnetcore/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22)
diff --git a/src/Http/Http/src/HeaderDictionary.cs b/src/Http/Http/src/HeaderDictionary.cs
index c13b2ccc567d..ee1911ba4690 100644
--- a/src/Http/Http/src/HeaderDictionary.cs
+++ b/src/Http/Http/src/HeaderDictionary.cs
@@ -451,7 +451,9 @@ void IEnumerator.Reset()
         {
             if (_notEmpty)
             {
+                var enumerator = _dictionaryEnumerator;
                 ((IEnumerator)_dictionaryEnumerator).Reset();
+                _dictionaryEnumerator = enumerator;
             }
         }
     }