diff --git a/mkimg.sh b/mkimg.sh
index e1b3d50..4bc2a54 100755
--- a/mkimg.sh
+++ b/mkimg.sh
@@ -19,7 +19,7 @@ if [ -z ${ANDROID_PRODUCT_OUT} ]; then
   exit_with_error "ANDROID_PRODUCT_OUT environment variable is not set. Run lunch first."
 fi
 
-for PARTITION in "boot" "system" "vendor"; do
+for PARTITION in "boot" "system" "vendor" "system_ext"; do
   if [ ! -f ${ANDROID_PRODUCT_OUT}/${PARTITION}.img ]; then
     exit_with_error "Partition image not found. Run 'make ${PARTITION}image' first."
   fi
@@ -51,14 +51,20 @@ echo n
 echo p
 echo 2
 echo
-echo +2560M
+echo +2048M
 echo n
 echo p
 echo 3
 echo
+echo +512M
+echo n
+echo p
+echo 4
+echo
 echo +256M
 echo n
 echo p
+echo 5
 echo
 echo
 echo t
@@ -83,8 +89,10 @@ echo "Copying system..."
 sudo dd if=${ANDROID_PRODUCT_OUT}/system.img of=/dev/mapper/${LOOPDEV}p2 bs=1M
 echo "Copying vendor..."
 sudo dd if=${ANDROID_PRODUCT_OUT}/vendor.img of=/dev/mapper/${LOOPDEV}p3 bs=1M
+echo "Creating system_ext..."
+sudo dd if=${ANDROID_PRODUCT_OUT}/system_ext.img of=/dev/mapper/${LOOPDEV}p4 bs=1M
 echo "Creating userdata..."
-sudo mkfs.ext4 /dev/mapper/${LOOPDEV}p4 -I 512 -L userdata
+sudo mkfs.ext4 /dev/mapper/${LOOPDEV}p5 -I 512 -L userdata
 sync
 
 sudo kpartx -d "/dev/${LOOPDEV}"