diff --git a/src/Http/Http.Abstractions/src/HostString.cs b/src/Http/Http.Abstractions/src/HostString.cs
index 0f7cbd73f6..c15d59bf56 100644
--- a/src/Http/Http.Abstractions/src/HostString.cs
+++ b/src/Http/Http.Abstractions/src/HostString.cs
@@ -96,7 +96,7 @@ namespace Microsoft.AspNetCore.Http
                 GetParts(_value, out var host, out var port);
 
                 if (!StringSegment.IsNullOrEmpty(port)
-                    && int.TryParse(port.ToString(), NumberStyles.None, CultureInfo.InvariantCulture, out var p))
+                    && int.TryParse(port.AsSpan(), NumberStyles.None, CultureInfo.InvariantCulture, out var p))
                 {
                     return p;
                 }