diff --git a/plasma/animations/slide_p.h b/plasma/animations/slide_p.h
index 23952613..3e2b6367 100644
--- a/plasma/animations/slide_p.h
+++ b/plasma/animations/slide_p.h
@@ -31,7 +31,6 @@
 namespace Plasma
 {
 
-class SlideAnimationPrivate;
 /**
  * @class Slide plasma/animations/slide.h
  * @short Slide effect