@@ -274,10 +274,17 @@
 
 	[super dealloc];
 }
 
 - addObject: (OFObject*)obj
+{
+	@throw [OFNotImplementedException newWithClass: isa
+					      selector: _cmd];
+}
+
+- addObject: (OFObject*)obj
+    atIndex: (size_t)index
 {
 	@throw [OFNotImplementedException newWithClass: isa
 					      selector: _cmd];
 }