diff --git a/smart_sfinv_api/init.lua b/smart_sfinv_api/init.lua
index bd17695..8711025 100644
--- a/smart_sfinv_api/init.lua
+++ b/smart_sfinv_api/init.lua
@@ -40,7 +40,7 @@ local enh_handler_class = {
 		formspec_size_add_h = 0,
 	}
 smart_sfinv_api.defaults = enh_handler_class
-enh_handler_class_meta = {__index = enh_handler_class }
+local enh_handler_class_meta = {__index = enh_handler_class }
 
 function enh_handler_class:run_enhancements(enh_method, ...)
 	for _, enh in ipairs(smart_sfinv_api.registered_enhancements) do
diff --git a/smart_sfinv_tweaks/maininv.lua b/smart_sfinv_tweaks/maininv.lua
index ad5cdc8..6b50ad2 100644
--- a/smart_sfinv_tweaks/maininv.lua
+++ b/smart_sfinv_tweaks/maininv.lua
@@ -1,6 +1,6 @@
 -- Enhanced main inventory methods
 local maininvClass = {}
-maininvClass_mt = {__index = maininvClass}
+local maininvClass_mt = {__index = maininvClass}
 
 -- Clear the inventory
 function maininvClass:remove_all()