diff --git a/packages/Avalonia/AvaloniaBuildTasks.targets b/packages/Avalonia/AvaloniaBuildTasks.targets
index 36843071f3..8fe77a095d 100644
--- a/packages/Avalonia/AvaloniaBuildTasks.targets
+++ b/packages/Avalonia/AvaloniaBuildTasks.targets
@@ -119,8 +119,10 @@
   </Target>
 
   <Target Name="AvaloniaCollectUpToDateCheckInputDesignTime" BeforeTargets="CollectUpToDateCheckInputDesignTime">
-    <UpToDateCheckInput Include="@(AvaloniaResource)" />
-    <UpToDateCheckInput Include="@(AvaloniaXaml)" />
+    <ItemGroup>
+      <UpToDateCheckInput Include="@(AvaloniaResource)" />
+      <UpToDateCheckInput Include="@(AvaloniaXaml)" />
+    </ItemGroup>
   </Target>
 
   <Target