diff --git a/cockatrice/src/interface/theme_manager.cpp b/cockatrice/src/interface/theme_manager.cpp
index 6a5514fb1..8b587be6e 100644
--- a/cockatrice/src/interface/theme_manager.cpp
+++ b/cockatrice/src/interface/theme_manager.cpp
@@ -133,6 +133,14 @@ bool ThemeManager::isDarkMode()
     return false;
 }
 
+bool ThemeManager::isBuiltInTheme()
+{
+    const auto themeName = SettingsCache::instance().getThemeName();
+
+    return themeName == NONE_THEME_NAME || themeName == FUSION_THEME_NAME || themeName == FUSION_THEME_NAME_LIGHT ||
+           themeName == FUSION_THEME_NAME_DARK;
+}
+
 QStringMap &ThemeManager::getAvailableThemes()
 {
     QDir dir;
diff --git a/cockatrice/src/interface/theme_manager.h b/cockatrice/src/interface/theme_manager.h
index 81e236732..416923128 100644
--- a/cockatrice/src/interface/theme_manager.h
+++ b/cockatrice/src/interface/theme_manager.h
@@ -54,6 +54,7 @@ protected:
     QBrush loadExtraBrush(QString fileName, QBrush &fallbackBrush);
 
 public:
+    bool isBuiltInTheme();
     bool isDarkMode();
     QStringMap &getAvailableThemes();