diff --git a/java/1.20.3/src/schemas/worldgen/Structure.ts b/java/1.20.3/src/schemas/worldgen/Structure.ts
index 0714edd..769b7d2 100644
--- a/java/1.20.3/src/schemas/worldgen/Structure.ts
+++ b/java/1.20.3/src/schemas/worldgen/Structure.ts
@@ -105,7 +105,10 @@ export function initStructureSchemas(schemas: SchemaRegistry, collections: Colle
         )
       },
       'minecraft:random_group': {
-        groups: ListNode(Reference('pool_alias_binding'))
+        groups: ListNode(ObjectNode({
+          weight: NumberNode({ integer: true }),
+          data: ListNode(Reference('pool_alias_binding')),
+        }))
       }
     }
   }, { context: 'pool_alias_binding' }), {