diff --git a/download-gamepacks.sh b/download-gamepacks.sh
index 19314c02..89cfe0c6 100644
--- a/download-gamepacks.sh
+++ b/download-gamepacks.sh
@@ -1,5 +1,9 @@
 #!/bin/sh
 
+# Usage:
+#   sh download-gamepack.sh
+#   LICENSEFILTER=GPL BATCH=1 sh download-gamepack.sh
+
 pack()
 {
 	pack=$1; shift