diff --git a/AppKit/CPArrayController.j b/AppKit/CPArrayController.j
index fe1d14419..b4f3365e3 100644
--- a/AppKit/CPArrayController.j
+++ b/AppKit/CPArrayController.j
@@ -342,7 +342,9 @@
 
 - (BOOL)setSelectionIndexes:(CPIndexSet)indexes
 {
+    [self _selectionWillChange]
     [self __setSelectionIndexes:indexes];
+    [self _selectionDidChange];
 }
 
 /*