diff --git a/packages/lumberaxe/lib/lumberaxe/json_formatter.rb b/packages/lumberaxe/lib/lumberaxe/json_formatter.rb
index cb690028..6262b881 100644
--- a/packages/lumberaxe/lib/lumberaxe/json_formatter.rb
+++ b/packages/lumberaxe/lib/lumberaxe/json_formatter.rb
@@ -23,7 +23,7 @@ def format_data(data)
                       hash[key] = value
                     else
                       hash[:tags] ||= []
-                      hash[:tags] << key
+                      hash[:tags] << tag
                     end
                     hash
                   end)