diff --git a/bam/blend/blendfile_path_walker.py b/bam/blend/blendfile_path_walker.py
index 6aaa744..0337db4 100644
--- a/bam/blend/blendfile_path_walker.py
+++ b/bam/blend/blendfile_path_walker.py
@@ -660,6 +660,7 @@ class ExpandID:
     @staticmethod
     def expand_OB(block):  # 'Object'
         yield from ExpandID._expand_generic_animdata(block)
+        yield from ExpandID._expand_generic_material(block)
         yield block.get_pointer(b'data')
         yield block.get_pointer(b'dup_group')