diff --git a/target/board/generic_arm_a/BoardConfig.mk b/target/board/generic_arm_a/BoardConfig.mk
index 57a5196a9..e3a670784 100644
--- a/target/board/generic_arm_a/BoardConfig.mk
+++ b/target/board/generic_arm_a/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 := 950009856
+
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
 TARGET_CPU_ABI := armeabi-v7a
diff --git a/target/board/treble_common_32.mk b/target/board/treble_common_32.mk
index 2c3447b4c..dbe089948 100644
--- a/target/board/treble_common_32.mk
+++ b/target/board/treble_common_32.mk
@@ -16,5 +16,6 @@
 
 include build/make/target/board/treble_common.mk
 
-# Partition size is default 906MB for 32 bits projects
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 950009856
+# Partition size defaults to 1 GB (1024 MB) for 32-bit products. It can
+# be overwritten in specific BoardConfig.mk, if so desired.
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1073741824