1 files changed, 1 insertions, 1 deletions

diff --git a/spec/outputs/class.lua b/spec/outputs/class.lua
index 85845d3..929c243 100644
--- a/spec/outputs/class.lua
+++ b/spec/outputs/class.lua
@@ -1033,7 +1033,7 @@ do
         for _index_0 = 1, #_list_0 do
                 local _mixin_0 = _list_0[_index_0]
                 for _key_0, _val_0 in pairs(_mixin_0.__base) do
-                        if not _key_0:match("^__") then
+                        if not _key_0:match("^__") and _base_0[_key_0] == nil then
                                 _base_0[_key_0] = _val_0
                         end
                 end