diff --git a/AppKit/CPOutlineView.j b/AppKit/CPOutlineView.j
index b94f34453..c2a27cada 100644
--- a/AppKit/CPOutlineView.j
+++ b/AppKit/CPOutlineView.j
@@ -1724,6 +1724,7 @@ var CPOutlineViewIndentationPerLevelKey = @"CPOutlineViewIndentationPerLevelKey"
         _outlineViewDelegate = [aCoder decodeObjectForKey:CPOutlineViewDelegateKey];
 
         [super setDataSource:[[_CPOutlineViewTableViewDataSource alloc] initWithOutlineView:self]];
+        [super setDelegate:[[_CPOutlineViewTableViewDelegate alloc] initWithOutlineView:self]];
     }
 
     return self;