diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 9d67c49..80f8002 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -99,6 +99,9 @@
 AVB_PARTITIONS = ('boot', 'dtbo', 'odm', 'product', 'product_services',
                   'recovery', 'system', 'vendor')
 
+# Chained VBMeta partitions.
+AVB_VBMETA_PARTITIONS = ('vbmeta_system', 'vbmeta_vendor')
+
 # Partitions that should have their care_map added to META/care_map.pb
 PARTITIONS_WITH_CARE_MAP = ('system', 'vendor', 'product', 'product_services',
                             'odm')