diff --git a/phhgsi_arm64_ab/BoardConfig.mk b/phhgsi_arm64_ab/BoardConfig.mk
index be9333e..1f6f532 100644
--- a/phhgsi_arm64_ab/BoardConfig.mk
+++ b/phhgsi_arm64_ab/BoardConfig.mk
@@ -3,6 +3,8 @@ include device/phh/treble/board-base.mk
 
 ifeq ($(BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE),)
 BOARD_SYSTEMIMAGE_PARTITION_SIZE := 2147483648
+else
+BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE := 33554432
 endif
 
 BUILD_BROKEN_PHONY_TARGETS := true