diff --git a/config/themes.json b/config/themes.json
index 4bc3766b..c4fc7800 100644
--- a/config/themes.json
+++ b/config/themes.json
@@ -22,6 +22,7 @@
                     "IconButtonSize":   "35",
                     "WinUtilIconSize":        "Auto",
                     "SettingsIconFontSize":   "18",
+                    "CloseIconFontSize":      "18",
 
                     "MicroWinLogoSize": "10",
 
@@ -92,6 +93,7 @@
                     "IconButtonSize":   "35",
                     "WinUtilIconSize":        "Auto",
                     "SettingsIconFontSize":   "18",
+                    "CloseIconFontSize":      "18",
 
                     "MicroWinLogoSize": "10",
 
@@ -160,6 +162,7 @@
                     "IconButtonSize":   "35",
                     "WinUtilIconSize":        "Auto",
                     "SettingsIconFontSize":   "18",
+                    "CloseIconFontSize":      "18",
 
                     "MicroWinLogoSize": "10",
 
diff --git a/xaml/inputXML.xaml b/xaml/inputXML.xaml
index 4648924f..86f899e9 100644
--- a/xaml/inputXML.xaml
+++ b/xaml/inputXML.xaml
@@ -710,7 +710,7 @@
                 HorizontalAlignment="Right" VerticalAlignment="Top"
                 Margin="0,5,5,0"
                 FontFamily="Arial"
-                Foreground="{MainForegroundColor}" FontSize="{IconFontSize}" Name="WPFCloseButton" />
+                Foreground="{MainForegroundColor}" FontSize="{CloseIconFontSize}" Name="WPFCloseButton" />
             </Grid>
 
         </DockPanel>