diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 929c810ed71..90ab984d94d 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,10 @@
 2012-07-16  Michael Albinus  <michael.albinus@gmx.de>
 
+	* eshell/em-ls.el (eshell/ls): Use `apply'.
+
+	* eshell/em-unix.el (eshell/su, eshell/sudo): Apply Tramp's ad-hoc
+	multi-hops, instead of Tramp internals.
+
 	* vc/ediff.el (ediff-directories): Add trailing space to prompts.
 
 	* vc/ediff-diff.el (ediff-same-file-contents): Handle the case,
diff --git a/lisp/eshell/em-ls.el b/lisp/eshell/em-ls.el
index 142a5f964ab..2dd92ba3530 100644
--- a/lisp/eshell/em-ls.el
+++ b/lisp/eshell/em-ls.el
@@ -312,7 +312,7 @@ instead."
   (let ((insert-func 'eshell-buffered-print)
 	(error-func 'eshell-error)
 	(flush-func 'eshell-flush))
-    (eshell-do-ls args)))
+    (apply 'eshell-do-ls args)))
 
 (put 'eshell/ls 'eshell-no-numeric-conversions t)
 
diff --git a/lisp/eshell/em-unix.el b/lisp/eshell/em-unix.el
index ddba5a6520a..35f7a0a9e3d 100644
--- a/lisp/eshell/em-unix.el
+++ b/lisp/eshell/em-unix.el
@@ -1037,12 +1037,8 @@ Show wall-clock time elapsed during execution of COMMAND.")
 
 (put 'eshell/occur 'eshell-no-numeric-conversions t)
 
-;; Pacify the byte-compiler.
-(defvar tramp-default-proxies-alist)
-
 (defun eshell/su (&rest args)
   "Alias \"su\" to call Tramp."
-  (require 'tramp)
   (setq args (eshell-stringify-list (eshell-flatten-list args)))
   (let ((orig-args (copy-tree args)))
     (eshell-eval-using-options
@@ -1057,29 +1053,29 @@ Become another USER during a login session.")
 		  (host (or (file-remote-p default-directory 'host)
 			    "localhost"))
 		  (dir (or (file-remote-p default-directory 'localname)
-			   (expand-file-name default-directory))))
+			   (expand-file-name default-directory)))
+		  (prefix (file-remote-p default-directory)))
 	      (dolist (arg args)
 		(if (string-equal arg "-") (setq login t) (setq user arg)))
 	      ;; `eshell-eval-using-options' does not handle "-".
 	      (if (member "-" orig-args) (setq login t))
 	      (if login (setq dir "~/"))
-	      (if (and (file-remote-p default-directory)
+	      (if (and prefix
 		       (or
 			(not (string-equal
 			      "su" (file-remote-p default-directory 'method)))
 			(not (string-equal
 			      user (file-remote-p default-directory 'user)))))
-		  (add-to-list
-		   'tramp-default-proxies-alist
-		   (list host user (file-remote-p default-directory))))
-	      (eshell-parse-command
-	       "cd" (list (format "/su:%s@%s:%s" user host dir))))))))
+		  (eshell-parse-command
+		   "cd" (list (format "%s|su:%s@%s:%s"
+				      (substring prefix 0 -1) user host dir)))
+		(eshell-parse-command
+		 "cd" (list (format "/su:%s@%s:%s" user host dir)))))))))
 
 (put 'eshell/su 'eshell-no-numeric-conversions t)
 
 (defun eshell/sudo (&rest args)
   "Alias \"sudo\" to call Tramp."
-  (require 'tramp)
   (setq args (eshell-stringify-list (eshell-flatten-list args)))
   (let ((orig-args (copy-tree args)))
     (eshell-eval-using-options
@@ -1094,21 +1090,26 @@ Execute a COMMAND as the superuser or another USER.")
 		  (host (or (file-remote-p default-directory 'host)
 			    "localhost"))
 		  (dir (or (file-remote-p default-directory 'localname)
-			   (expand-file-name default-directory))))
+			   (expand-file-name default-directory)))
+		  (prefix (file-remote-p default-directory)))
 	      ;; `eshell-eval-using-options' reads options of COMMAND.
 	      (while (and (stringp (car orig-args))
 			  (member (car orig-args) '("-u" "--user")))
 		(setq orig-args (cddr orig-args)))
-	      (if (and (file-remote-p default-directory)
-		       (or
-			(not (string-equal
-			      "sudo" (file-remote-p default-directory 'method)))
-			(not (string-equal
-			      user (file-remote-p default-directory 'user)))))
-		  (add-to-list
-		   'tramp-default-proxies-alist
-		   (list host user (file-remote-p default-directory))))
-	      (let ((default-directory (format "/sudo:%s@%s:%s" user host dir)))
+	      (let ((default-directory
+		      (if (and prefix
+			       (or
+				(not
+				 (string-equal
+				  "sudo"
+				  (file-remote-p default-directory 'method)))
+				(not
+				 (string-equal
+				  user
+				  (file-remote-p default-directory 'user)))))
+			  (format "%s|sudo:%s@%s:%s"
+				  (substring prefix 0 -1) user host dir)
+			(format "/sudo:%s@%s:%s" user host dir))))
 		(eshell-named-command (car orig-args) (cdr orig-args))))))))
 
 (put 'eshell/sudo 'eshell-no-numeric-conversions t)