diff --git a/Windows/Perspex.Win32/Interop/UnmanagedMethods.cs b/Windows/Perspex.Win32/Interop/UnmanagedMethods.cs
index 44e655fabd..8481b7affb 100644
--- a/Windows/Perspex.Win32/Interop/UnmanagedMethods.cs
+++ b/Windows/Perspex.Win32/Interop/UnmanagedMethods.cs
@@ -666,7 +666,7 @@ namespace Perspex.Win32.Interop
             public int dwHoverTime;
         }
 
-        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+        [StructLayout(LayoutKind.Sequential)]
         public struct WNDCLASSEX
         {
             public int cbSize;