diff --git a/src/Ursa.Themes.Semi/Index.axaml b/src/Ursa.Themes.Semi/Index.axaml
index 49e499a..5db88d3 100644
--- a/src/Ursa.Themes.Semi/Index.axaml
+++ b/src/Ursa.Themes.Semi/Index.axaml
@@ -15,8 +15,6 @@
                 <ResourceInclude Source="Themes/Shared/_index.axaml" />
                 <ResourceInclude Source="Locale/zh-cn.axaml" />
             </ResourceDictionary.MergedDictionaries>
-            <!-- This resource definition is from Semi Avalonia 11.2.1. This can be removed after Ursa dependency is higher than Avalonia 11.2.1 -->
-            <Thickness x:Key="ComboBoxPopupBorderMargin">4</Thickness>
         </ResourceDictionary>
     </Styles.Resources>
 
diff --git a/src/Ursa.Themes.Semi/Themes/Shared/_index.axaml b/src/Ursa.Themes.Semi/Themes/Shared/_index.axaml
index e6a449c..9d1bb41 100644
--- a/src/Ursa.Themes.Semi/Themes/Shared/_index.axaml
+++ b/src/Ursa.Themes.Semi/Themes/Shared/_index.axaml
@@ -24,4 +24,6 @@
         <ResourceInclude Source="Toast.axaml" />
         <ResourceInclude Source="ToolBar.axaml" />
     </ResourceDictionary.MergedDictionaries>
+    <!-- This resource definition is from Semi Avalonia 11.2.1. This can be removed after Ursa dependency is higher than Avalonia 11.2.1 -->
+    <Thickness x:Key="ComboBoxPopupBorderMargin">4</Thickness>
 </ResourceDictionary>
\ No newline at end of file