diff --git a/src/main.cpp b/src/main.cpp
index f3d967ebb..25863984f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -68,7 +68,7 @@ int main(int argc, char *argv[])
     }
 #endif
 
-#if Q_OS_WINDOWS
+#ifdef Q_OS_WINDOWS
     QApplication::setStyle(QStringLiteral("breeze"));
 #endif