X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/4d7ac88c6827fab1e25238415ed0ebdf7d7f5404..eefacd4c6653485b3da8dc267a8068207398464b:/cmdline/apt-mark

diff --git a/cmdline/apt-mark b/cmdline/apt-mark
index 2326ece38..466a56f27 100755
--- a/cmdline/apt-mark
+++ b/cmdline/apt-mark
@@ -82,6 +82,9 @@ if __name__ == "__main__":
     else:
         STATE_FILE=options.filename
 
+    if len(args) == 0:
+        parser.error("first argument must be 'markauto', 'unmarkauto' or 'showauto'")
+
     if args[0] == "showauto":
         show_automatic(STATE_FILE)
     else: