diff --git a/package/debian-chroot/package b/package/debian-chroot/package
index 6782267e4..5c105896d 100644
--- a/package/debian-chroot/package
+++ b/package/debian-chroot/package
@@ -50,7 +50,7 @@ debian-chroot() {
             echo "debian-chroot is not mounted"
             exit 0
         fi
-        do_umount(){
+        do_umount() {
             mp=$1
             shift
             if mountpoint -q $mp; then