1 files changed, 3 insertions, 2 deletions
diff --git a/actionpack/lib/action_view/helpers/tags/base.rb b/actionpack/lib/action_view/helpers/tags/base.rb
index 24956beb9c..449f94d347 100644
--- a/actionpack/lib/action_view/helpers/tags/base.rb
+++ b/actionpack/lib/action_view/helpers/tags/base.rb
@@ -19,8 +19,9 @@ module ActionView
           @auto_index = retrieve_autoindex(Regexp.last_match.pre_match) if Regexp.last_match
         end
 
-        def render(&block)
-          raise "Abstract Method called"
+        # This is what child classes implement.
+        def render
+          raise NotImplementedError, "Subclasses must implement a render method"
         end
 
         private