diff --git a/src/EventFilter.h b/src/EventFilter.h
index bdccbdf0..7465ba77 100644
--- a/src/EventFilter.h
+++ b/src/EventFilter.h
@@ -13,7 +13,7 @@ public:
 	EventFilter(QObject *parent) : QObject(parent) {}
 protected:
 	bool eventFilter(QObject *obj, QEvent *event) {
-		// Handle Apple event for opening files
+		// Handle Apple event for opening files, only available on OS X
 		if (event->type() == QEvent::FileOpen) {
 			QFileOpenEvent *foe = static_cast<QFileOpenEvent *>(event);
 			const QString &filename = foe->file();