diff --git a/modify.sh b/modify.sh
index d5298c5..42c858f 100644
--- a/modify.sh
+++ b/modify.sh
@@ -70,7 +70,7 @@ mount -o rw "$LOOP_DEV"p3 "$MOUNT_DIR"
 mkdir -p "$MOUNT_DIR/usr/share/packeddata"
 cp -rvf "./out/." "$MOUNT_DIR/usr/share/packeddata"
 cp "inshim.sh" "$MOUNT_DIR/usr/bin/inshim.sh"
-umount $MOUNT_DIR
+umount "$MOUNT_DIR"
 sync
 sync
 sync