diff --git a/fast64_internal/f3d/f3d_material_helpers.py b/fast64_internal/f3d/f3d_material_helpers.py
index d3220b2ea..1ab707851 100644
--- a/fast64_internal/f3d/f3d_material_helpers.py
+++ b/fast64_internal/f3d/f3d_material_helpers.py
@@ -59,6 +59,7 @@ def unlock_material(self):
     "node",
     "bl_idname",
     "default_value",
+    "is_unavailable",
 )