diff --git a/build.sh b/build.sh
index 28d1b10..65dd0de 100755
--- a/build.sh
+++ b/build.sh
@@ -337,5 +337,5 @@ rm -r $DEST/output/sdcard/
 
 if [ "$COMPRESS" = "true" ]; then
     echo "compress image"
-    gzip $DEST/output/*.raw
+    xz -z $DEST/output/${IMG_NAME}-${VERSION}_rootfs_SD.raw
 fi