diff --git a/pkgs/min-copy-closure/liminix-rebuild.sh b/pkgs/min-copy-closure/liminix-rebuild.sh
index 1992e92..b50d849 100755
--- a/pkgs/min-copy-closure/liminix-rebuild.sh
+++ b/pkgs/min-copy-closure/liminix-rebuild.sh
@@ -12,7 +12,7 @@ target_host=$1
 shift
 
 if [ -z "$target_host" ] ; then
-    echo Usage: liminix-rebuild [--no-reboot] target-host params
+    echo Usage: liminix-rebuild \[--no-reboot\] target-host params
     exit 1
 fi