diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index 61aa67c..c89e203 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -33,6 +33,13 @@
 #   updating the last seen rollback index in the tamper-evident storage.
 BOARD_AVB_ROLLBACK_INDEX := 0
 
+# Enable chain partition for system.
+# GSI need to sign on system.img instead of vbmeta.
+BOARD_AVB_SYSTEM_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
+BOARD_AVB_SYSTEM_ALGORITHM := SHA256_RSA2048
+BOARD_AVB_SYSTEM_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
+BOARD_AVB_SYSTEM_ROLLBACK_INDEX_LOCATION := 1
+
 # GSI specific System Properties
 ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
 TARGET_SYSTEM_EXT_PROP := build/make/target/board/gsi_system_ext.prop