diff --git a/mikrotik-update.sh b/mikrotik-update.sh
index b2c0fc6..934ea47 100755
--- a/mikrotik-update.sh
+++ b/mikrotik-update.sh
@@ -5,9 +5,15 @@
 if [ $# -lt 2 ]; then
     echo "$0 <version> <arch> router [router...]"
     cat <<EOF
+Version:
+- the package version as found on https://mikrotik.com/download
 Arch:
 - rb4011: arm
+- crs326: arm
 - hapac:  mipsbe
+
+router:
+- The hostname(s) or IP(v6) addresses of the routers you want to update
 EOF
     exit 1
 fi