diff --git a/lib/flowerbox/result/failure_message.rb b/lib/flowerbox/result/failure_message.rb
index 80b19bc..6dc5c2a 100644
--- a/lib/flowerbox/result/failure_message.rb
+++ b/lib/flowerbox/result/failure_message.rb
@@ -31,7 +31,7 @@ module Flowerbox::Result
     end
 
     def stack
-      @data['stack']
+      @data['stack'] || []
     end
 
     def first_local_stack