diff --git a/activerecord/lib/active_record/serialization.rb b/activerecord/lib/active_record/serialization.rb
index ad3f7afd6f..dc73075a59 100644
--- a/activerecord/lib/active_record/serialization.rb
+++ b/activerecord/lib/active_record/serialization.rb
@@ -22,7 +22,7 @@ module ActiveRecord #:nodoc:
     end
 
     private
-      # Add associations specified via the <tt>:includes</tt> option.
+      # Add associations specified via the <tt>:include</tt> option.
       #
       # Expects a block that takes as arguments:
       #   +association+ - name of the association