diff --git a/src/Ursa.Themes.Semi/Controls/UrsaWindow.axaml b/src/Ursa.Themes.Semi/Controls/UrsaWindow.axaml
index cf4d280..886a061 100644
--- a/src/Ursa.Themes.Semi/Controls/UrsaWindow.axaml
+++ b/src/Ursa.Themes.Semi/Controls/UrsaWindow.axaml
@@ -174,5 +174,8 @@
                 </StackPanel>
             </ControlTemplate>
         </Setter>
+        <Style Selector="^:maximized /template/ PathIcon#PART_RestoreButtonIcon">
+            <Setter Property="Data" Value="{DynamicResource WindowRestoreGlyph}" />
+        </Style>
     </ControlTheme>
 </ResourceDictionary>
\ No newline at end of file