--- plugins/check_by_ssh_dev.c  2014-11-26 10:09:56.942045038 +0100
+++ plugins/check_by_ssh.c      2014-11-26 10:10:33.665762563 +0100
@@ -186,6 +186,7 @@
                {"use-ipv4", no_argument, 0, '4'},
                {"use-ipv6", no_argument, 0, '6'},
                {"ssh-option", required_argument, 0, 'o'},
+               {"force-tty", no_argument, 0, 'z'},
                {"quiet", no_argument, 0, 'q'},
                {"configfile", optional_argument, 0, 'F'},
                {0, 0, 0, 0}
@@ -199,7 +200,7 @@
                        strcpy (argv[c], "-t");

        while (1) {
-               c = getopt_long (argc, argv, "Vvh1246fqt:H:O:p:i:u:l:C:S::E::n:s:o:F:", longopts,
+               c = getopt_long (argc, argv, "Vvh1246fqzt:H:O:p:i:u:l:C:S::E::n:s:o:F:", longopts,
                                 &option);

                if (c == -1 || c == EOF)
@@ -275,6 +276,9 @@
                case '6':                                                               /* -6 for IPv6 */
                        comm_append("-6");
                        break;
+               case 'z':                                                                       /* force psudeo tty allocation */
+                       comm_append("-t");
+                       break;
                case 'f':                                                                       /* fork to background */
                        comm_append("-f");
                        break;
@@ -423,6 +427,8 @@
   printf ("    %s\n", _("short name of host in the monitoring configuration [optional]"));
   printf (" %s\n","-o, --ssh-option=OPTION");
   printf ("    %s\n", _("Call ssh with '-o OPTION' (may be used multiple times) [optional]"));
+  printf (" %s\n","-z, --force-tty");
+  printf ("    %s\n", _("Call ssh with '-t' to force pseudo tty allocation. Has to be used in conjunction with -E [optional]"));
   printf (" %s\n","-F, --configfile");
   printf ("    %s\n", _("Tell ssh to use this configfile [optional]"));
   printf (" %s\n","-q, --quiet");
@@ -461,6 +467,6 @@
        printf (" %s -H <host> -C <command> [-fqv] [-1|-2] [-4|-6]\n"
                "       [-S [lines]] [-E [lines]] [-t timeout] [-i identity]\n"
                "       [-l user] [-n name] [-s servicelist] [-O outputfile]\n"
-               "       [-p port] [-o ssh-option] [-F configfile]\n",
+               "       [-p port] [-z] [-o ssh-option] [-F configfile]\n",
                progname);
 }