diff --git a/launcher/ui/themes/ThemeManager.cpp b/launcher/ui/themes/ThemeManager.cpp
index 601bc66c2..e4ad49db3 100644
--- a/launcher/ui/themes/ThemeManager.cpp
+++ b/launcher/ui/themes/ThemeManager.cpp
@@ -135,7 +135,7 @@ void ThemeManager::initializeWidgets()
     themeDebugLog() << "<> Initializing System Themes";
     QStringList styles = QStyleFactory::keys();
     for (auto& st : styles) {
-#if Q_OS_WINDOWS
+#ifdef Q_OS_WINDOWS
         if (QSysInfo::productVersion() != "11" && st == "windows11") {
             continue;
         }