diff -up sudo-1.8.6p3/src/sesh.c.arg0fix sudo-1.8.6p3/src/sesh.c
--- sudo-1.8.6p3/src/sesh.c.arg0fix	2014-05-19 12:47:29.326716729 +0200
+++ sudo-1.8.6p3/src/sesh.c	2014-05-19 12:47:51.810798125 +0200
@@ -214,6 +214,8 @@ cleanup_0:
         if (argv[-1][0] == '-') {
             if ((cp = strrchr(argv[0], '/')) == NULL)
                 cp = argv[0];
+            else
+                argv[0] = cp;
             *cp = '-';
         }
         sudo_execve(cmnd, argv, envp, noexec);