diff --git a/AppKit/CPCollectionView.j b/AppKit/CPCollectionView.j
index caa414c96..98a2ea69b 100644
--- a/AppKit/CPCollectionView.j
+++ b/AppKit/CPCollectionView.j
@@ -1217,7 +1217,10 @@ Not supported. Use -collectionView:dataForItemsAtIndexes:fortype:
 
 - (void)_modifySelectionWithNewIndex:(int)anIndex direction:(int)aDirection expand:(BOOL)shouldExpand
 {
-    anIndex = MIN(MAX(anIndex, 0), [[self items] count] - 1);
+    var count = [[self items] count];
+    if (count === 0)
+        return;
+    anIndex = MIN(MAX(anIndex, 0), count - 1);
 
     if (_allowsMultipleSelection && shouldExpand)
     {