diff --git a/src/ReferenceCop.Roslyn.CodeFixes/ReferenceCopCodeFixProvider.cs b/src/ReferenceCop.Roslyn.CodeFixes/ReferenceCopCodeFixProvider.cs
index 3f5125d..5224d23 100644
--- a/src/ReferenceCop.Roslyn.CodeFixes/ReferenceCopCodeFixProvider.cs
+++ b/src/ReferenceCop.Roslyn.CodeFixes/ReferenceCopCodeFixProvider.cs
@@ -18,7 +18,7 @@ public class ReferenceCopCodeFixProvider : CodeFixProvider
     {
         public sealed override ImmutableArray<string> FixableDiagnosticIds
         {
-            get { return Enumerable.Empty<string>().ToImmutableArray<string>(); }
+            get { return ImmutableArray<string>.Empty; }
         }
 
         public sealed override FixAllProvider GetFixAllProvider()