diff --git a/src/Windows/Avalonia.Win32/WinRT/IBlurHost.cs b/src/Windows/Avalonia.Win32/WinRT/IBlurHost.cs
index ea5dcdeeba..526be6e0f0 100644
--- a/src/Windows/Avalonia.Win32/WinRT/IBlurHost.cs
+++ b/src/Windows/Avalonia.Win32/WinRT/IBlurHost.cs
@@ -7,7 +7,7 @@
         Mica
     }
     
-    public interface IBlurHost
+    internal interface IBlurHost
     {
         void SetBlur(BlurEffect enable);
     }