diff -ur chkconfig-1.2.24~/chkconfig.c chkconfig-1.2.24/chkconfig.c
--- chkconfig-1.2.24~/chkconfig.c	Sat Jan 26 20:13:02 2002
+++ chkconfig-1.2.24/chkconfig.c	Sat Jan 26 20:27:34 2002
@@ -283,6 +283,8 @@
     bindtextdomain("chkconfig","/usr/share/locale"); 
     textdomain("chkconfig"); 
 
+    if (argc < 1) usage();
+
     optCon = poptGetContext("chkconfig", argc, argv, optionsTable, 0);
     poptReadDefaultConfig(optCon, 1);