diff --git a/tools/releasetools/merge_target_files.py b/tools/releasetools/merge_target_files.py
index d9d3854..ed42b20 100755
--- a/tools/releasetools/merge_target_files.py
+++ b/tools/releasetools/merge_target_files.py
@@ -175,6 +175,9 @@
     'ab_update',
     'default_system_dev_certificate',
     'system_size',
+    'building_system_image',
+    'building_system_ext_image',
+    'building_product_image',
 )
 
 # DEFAULT_VENDOR_ITEM_LIST is a list of items to extract from the partial