diff --git a/actionpack/lib/action_view/template/error.rb b/actionpack/lib/action_view/template/error.rb
index b1839b65e5..423e1e0bf5 100644
--- a/actionpack/lib/action_view/template/error.rb
+++ b/actionpack/lib/action_view/template/error.rb
@@ -52,6 +52,7 @@ module ActionView
 
       def initialize(template, assigns, original_exception)
         @template, @assigns, @original_exception = template, assigns.dup, original_exception
+        @sub_templates = nil
         @backtrace = original_exception.backtrace
       end