diff --git a/get b/get
index 11ef52d..e853ea3 100644
--- a/get
+++ b/get
@@ -1,6 +1,15 @@
 -- utility to download files from the git repo
 
+local function printUsage()
+    print("Usage:")
+    print("get <filename>")
+end
+ 
 local args = { ... }
+if #args < 1 then
+    printUsage()
+    return
+end
 local file = args[1]
 
 shell.run("rm", file)