diff --git a/app/controllers/related_tags_controller.rb b/app/controllers/related_tags_controller.rb
index 1328ffe32..a11fecd8e 100644
--- a/app/controllers/related_tags_controller.rb
+++ b/app/controllers/related_tags_controller.rb
@@ -2,7 +2,7 @@ class RelatedTagsController < ApplicationController
   respond_to :json
   
   def show
-    @query = RelatedTagQuery.new(params[:query], params[:category])
+    @query = RelatedTagQuery.new(params[:query].to_s.downcase, params[:category])
     respond_with(@query) do |format|
       format.json do
         render :json => @query.to_json