diff --git a/nodes.lua b/nodes.lua
index ab97c8c..d918b52 100644
--- a/nodes.lua
+++ b/nodes.lua
@@ -128,5 +128,5 @@ core.register_alias('glass:glass', 'glass:plain')
 core.register_alias('obsidian_glass', 'glass:obsidian')
 
 -- Nodes from 'default'
-core.register_alias('default:glass', 'glass:plain')
-core.register_alias('default:obsidian_glass', 'glass:obsidian')
+core.register_alias_force('default:glass', 'glass:plain')
+core.register_alias_force('default:obsidian_glass', 'glass:obsidian')