diff --git a/AppKit/CPArrayController.j b/AppKit/CPArrayController.j
index c465aa4d8..6d3f92abf 100644
--- a/AppKit/CPArrayController.j
+++ b/AppKit/CPArrayController.j
@@ -136,7 +136,7 @@
     _sortDescriptors = [CPArray array];
     _filterPredicate = nil;
     _selectionIndexes = [CPIndexSet indexSet];
-    _arrangedObjects = nil;
+    _arrangedObjects = [CPArray array];
 }
 
 - (void)prepareContent
diff --git a/Tests/AppKit/CPArrayControllerTest.j b/Tests/AppKit/CPArrayControllerTest.j
index 84506e5a8..b83b580e1 100644
--- a/Tests/AppKit/CPArrayControllerTest.j
+++ b/Tests/AppKit/CPArrayControllerTest.j
@@ -56,6 +56,24 @@
     [self assert:object equals:[[arrayController arrangedObjects] objectAtIndex:1]];
 }
 
+- (void)testAddObjectUpdatesArrangedObjectsWithoutSortDescriptors
+{
+    var arrayController = [[CPArrayController alloc] init];
+
+    [arrayController addObject:@"content"];
+    [self assert:[@"content"] equals:[arrayController content]];
+    [self assert:[@"content"] equals:[arrayController arrangedObjects]];
+}
+
+- (void)testInsertObjectUpdatesArrangedObjectsWithoutSortDescriptors
+{
+    var arrayController = [[CPArrayController alloc] init];
+
+    [arrayController insertObject:@"content" atArrangedObjectIndex:0];
+    [self assert:[@"content"] equals:[arrayController content]];
+    [self assert:[@"content"] equals:[arrayController arrangedObjects]];
+}
+
 - (void)testSelectPrevious
 {
     var arrayController = [self arrayController];