diff --git a/src/controls/QskSlider.h b/src/controls/QskSlider.h
index 21d77d4a..7d37f7e7 100644
--- a/src/controls/QskSlider.h
+++ b/src/controls/QskSlider.h
@@ -8,9 +8,6 @@
 
 #include "QskBoundedValueInput.h"
 
-class QSGNode;
-class QskSkin;
-
 class QSK_EXPORT QskSlider : public QskBoundedValueInput
 {
     Q_OBJECT