diff --git a/src/Razor/Razor/src/TagHelpers/NullHtmlEncoder.cs b/src/Razor/Razor/src/TagHelpers/NullHtmlEncoder.cs
index be4b2d17c2..f1d0410e8b 100644
--- a/src/Razor/Razor/src/TagHelpers/NullHtmlEncoder.cs
+++ b/src/Razor/Razor/src/TagHelpers/NullHtmlEncoder.cs
@@ -79,8 +79,9 @@ namespace Microsoft.AspNetCore.Razor.TagHelpers
                 return;
             }
 
-            var span = value.AsSpan();
-            output.Write(span.Slice(startIndex, characterCount));
+            var span = value.AsSpan(startIndex, characterCount);
+            
+            output.Write(span);
         }
 
         /// <inheritdoc />