diff --git a/lib/hoptoad/v2.rb b/lib/hoptoad/v2.rb
index 12a9bf0..6c09197 100644
--- a/lib/hoptoad/v2.rb
+++ b/lib/hoptoad/v2.rb
@@ -50,7 +50,7 @@ module Hoptoad
 
     def self.for_errbit_api(notice)
       {
-        :klass              => notice['error']['class'],
+        :klass              => notice['error']['class'] || notice['error']['key'],
         :message            => notice['error']['message'],
         :backtrace          => notice['error']['backtrace']['line'],
 
--
libgit2 0.21.2