diff --git a/lib/freedom_patches/fast_pluck.rb b/lib/freedom_patches/fast_pluck.rb
index d365a614f8e..45da8550365 100644
--- a/lib/freedom_patches/fast_pluck.rb
+++ b/lib/freedom_patches/fast_pluck.rb
@@ -5,6 +5,8 @@ require_dependency 'sql_builder'
 
 class ActiveRecord::Relation
 
+  # Note: In discourse, the following code is included in lib/sql_builder.rb
+  #
   # class RailsDateTimeDecoder < PG::SimpleDecoder
   #   def decode(string, tuple=nil, field=nil)
   #     if Rails.version >= "4.2.0"