diff --git a/mklive.sh.in b/mklive.sh.in
index 0b31371..bb7a5e4 100644
--- a/mklive.sh.in
+++ b/mklive.sh.in
@@ -253,7 +253,7 @@ generate_squashfs() {
     umount_pseudofs
 
     # Find out required size for the rootfs and create an ext3fs image off it.
-    ROOTFS_SIZE=$(du -sm "$ROOTFS"|awk '{print $1}')
+    ROOTFS_SIZE=$(du --apparent-size -sm "$ROOTFS"|awk '{print $1}')
     mkdir -p "$BUILDDIR/tmp/LiveOS"
     truncate -s "$((ROOTFS_SIZE+ROOTFS_SIZE/6))M" \
 	    "$BUILDDIR"/tmp/LiveOS/ext3fs.img >/dev/null 2>&1