diff --git a/app/controllers/glossary_terms_controller.rb b/app/controllers/glossary_terms_controller.rb
index ebc23a9..f2f5767 100644
--- a/app/controllers/glossary_terms_controller.rb
+++ b/app/controllers/glossary_terms_controller.rb
@@ -13,5 +13,7 @@ class GlossaryTermsController < ApplicationController
   # Find the term whose id is the :id parameter
   def find_term_from_id
     @term = GlossaryTerm.find(params[:id])
+  rescue ActiveRecord::RecordNotFound
+    render_404
   end
 end