diff --git a/tests/Avalonia.Benchmarks/Utilities/AvaloniaPropertyDictionaryBenchmarks.cs b/tests/Avalonia.Benchmarks/Utilities/AvaloniaPropertyDictionaryBenchmarks.cs
index e160c8dfa8..ef21100d1f 100644
--- a/tests/Avalonia.Benchmarks/Utilities/AvaloniaPropertyDictionaryBenchmarks.cs
+++ b/tests/Avalonia.Benchmarks/Utilities/AvaloniaPropertyDictionaryBenchmarks.cs
@@ -172,7 +172,7 @@ internal sealed class AvaloniaPropertyValueStoreOld<TValue>
 
 internal class MockProperty : StyledProperty<int>
 {
-    public MockProperty(string name) : base(name, typeof(object), new StyledPropertyMetadata<int>())
+    public MockProperty(string name) : base(name, typeof(object), typeof(object), new StyledPropertyMetadata<int>())
     {
     }
 }