diff --git a/lib/jekyll/collection.rb b/lib/jekyll/collection.rb
index 874d26f2215..318642151a1 100644
--- a/lib/jekyll/collection.rb
+++ b/lib/jekyll/collection.rb
@@ -239,7 +239,7 @@ def sort_docs_by_key!
 
         # Fall back to `Document#<=>` if the properties were equal or were non-sortable
         # Otherwise continue with current sort-order
-        if order.zero? || order.nil?
+        if order.nil? || order.zero?
           apples[-1] <=> olives[-1]
         else
           order