diff --git a/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/RegexKind.cs b/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/RegexKind.cs
index a1970720d54979ee86ebab53fe5e95c7d4089604..188aa5eed42d9db931420975b7620fd4f6bfba23 100644
--- a/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/RegexKind.cs
+++ b/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/RegexKind.cs
@@ -4,7 +4,7 @@ namespace Microsoft.CodeAnalysis.EmbeddedLanguages.RegularExpressions
 {
     internal enum RegexKind
     {
-        None,
+        None = 0,
         EndOfFile,
         Sequence,
         CompilationUnit,