diff --git a/actionpack/lib/action_view/template/error.rb b/actionpack/lib/action_view/template/error.rb
index b1839b65e5e7d2987b8d16db206320f898d48517..423e1e0bf55f375aaf134b70369cd48de9c053a1 100644
--- a/actionpack/lib/action_view/template/error.rb
+++ b/actionpack/lib/action_view/template/error.rb
@@ -52,6 +52,7 @@ class Error < ActionViewError #:nodoc:
 
       def initialize(template, assigns, original_exception)
         @template, @assigns, @original_exception = template, assigns.dup, original_exception
+        @sub_templates = nil
         @backtrace = original_exception.backtrace
       end