diff --git a/AppKit/CPTextView/CPRulerView.j b/AppKit/CPTextView/CPRulerView.j
index aaef07851..397877a7f 100644
--- a/AppKit/CPTextView/CPRulerView.j
+++ b/AppKit/CPTextView/CPRulerView.j
@@ -36,6 +36,7 @@ CPRulerOrientationHorizontal = 0,
 CPRulerOrientationVertical = 1
 
 @class CPRulerView;
+@class CPScrollView;
 
 
 // MARK: - CPRulerMarker (Interactive Handles with Dynamic Alignment Icons)