diff --git a/src/toplevel.h b/src/toplevel.h
index b25891b915..cc1994aa81 100644
--- a/src/toplevel.h
+++ b/src/toplevel.h
@@ -52,6 +52,9 @@ enum class ReleaseReason {
     KWinShutsDown ///< Release on KWin Shutdown (window still valid)
 };
 
+/** 
+ * Represents a window.
+ */
 class KWIN_EXPORT Toplevel : public QObject
 {
     Q_OBJECT