diff --git a/target/board/generic_arm_a/BoardConfig.mk b/target/board/generic_arm_a/BoardConfig.mk
index e3a6707..d930749 100644
--- a/target/board/generic_arm_a/BoardConfig.mk
+++ b/target/board/generic_arm_a/BoardConfig.mk
@@ -17,7 +17,7 @@
 include build/make/target/board/treble_common_32.mk
 
 # Overwrite the setting in treble_common_32.mk for non-A/B arm GSI
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 950009856
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 805306368 # 768MB
 
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
diff --git a/target/board/generic_arm_ab/BoardConfig.mk b/target/board/generic_arm_ab/BoardConfig.mk
index ae8de14..011bcdf 100644
--- a/target/board/generic_arm_ab/BoardConfig.mk
+++ b/target/board/generic_arm_ab/BoardConfig.mk
@@ -16,6 +16,9 @@
 
 include build/make/target/board/treble_common_32.mk
 
+# Overwrite the setting in treble_common_32.mk for non-A/B arm GSI
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 805306368 # 768MB
+
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
 TARGET_CPU_ABI := armeabi-v7a