diff --git a/app/helpers/search_term_helper.rb b/app/helpers/search_term_helper.rb
index 0b25a6e..8451e2f 100644
--- a/app/helpers/search_term_helper.rb
+++ b/app/helpers/search_term_helper.rb
@@ -12,6 +12,7 @@ module SearchTermHelper
 
   #TODO Think smarter criteria to normalize search terms properly
   def normalize_term(search_term)
+    search_term ||= ''
     search_term.downcase
   end
 end
--
libgit2 0.21.2