diff --git a/macosx/InfoWindowController.m b/macosx/InfoWindowController.m
index 7dd00a890..c5b078f18 100644
--- a/macosx/InfoWindowController.m
+++ b/macosx/InfoWindowController.m
@@ -1765,6 +1765,7 @@ typedef enum
     //sort by IP after primary sort
     if (useSecond)
     {
+        #warning when 10.6-only, replate with sortDescriptorWithKey:ascending:selector:
         NSSortDescriptor * secondDescriptor = [[NSSortDescriptor alloc] initWithKey: @"IP" ascending: asc
                                                                         selector: @selector(compareNumeric:)];
         [descriptors addObject: secondDescriptor];