From a9957c647cd3f4037dc151ae0118297e476c1bac Mon Sep 17 00:00:00 2001
From: Jeremy Koritzinsky <jkoritzinsky@gmail.com>
Date: Sat, 4 Jul 2020 16:52:39 -0700
Subject: [PATCH] Fix build failure from the merge to master.

---
 src/Avalonia.Base/Utilities/StyleClassParser.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Avalonia.Base/Utilities/StyleClassParser.cs b/src/Avalonia.Base/Utilities/StyleClassParser.cs
index 2db58f73d9..a4d6a33ad9 100644
--- a/src/Avalonia.Base/Utilities/StyleClassParser.cs
+++ b/src/Avalonia.Base/Utilities/StyleClassParser.cs
@@ -10,7 +10,7 @@ namespace Avalonia.Utilities
     {
         public static ReadOnlySpan<char> ParseStyleClass(this ref CharacterReader r)
         {
-            if (IsValidIdentifierStart(r.Peek))
+            if (IsValidIdentifierStart(r.PeekOneOrThrow))
             {
                 return r.TakeWhile(c => IsValidIdentifierChar(c));
             }