diff --git a/lib/handlebars_assets/config.rb b/lib/handlebars_assets/config.rb
index 6e31f85..f987d4e 100644
--- a/lib/handlebars_assets/config.rb
+++ b/lib/handlebars_assets/config.rb
@@ -70,6 +70,7 @@ def template_namespace
     def generate_known_helpers_hash
       known_helpers.inject({}) do |hash, helper|
         hash[helper] = true
+        hash
       end
     end