diff --git a/lisp/ob-R.el b/lisp/ob-R.el
index 5e9d35f58..b37e3965a 100644
--- a/lisp/ob-R.el
+++ b/lisp/ob-R.el
@@ -437,24 +439,23 @@ (defun org-babel-R-evaluate-session
 	  (org-babel-import-elisp-from-file tmp-file '(16)))
 	column-names-p)))
     (output
-     (mapconcat
-      'org-babel-chomp
-      (butlast
-       (delq nil
-	     (mapcar
-	      (lambda (line) (when (> (length line) 0) line))
-	      (mapcar
-	       (lambda (line) ;; cleanup extra prompts left in output
-		 (if (string-match
-		      "^\\([>+.]\\([ ][>.+]\\)*[ ]\\)"
-		      (car (split-string line "\n")))
-		     (substring line (match-end 1))
-		   line))
-	       (org-babel-comint-with-output (session org-babel-R-eoe-output)
-		 (insert (mapconcat 'org-babel-chomp
-				    (list body org-babel-R-eoe-indicator)
-				    "\n"))
-		 (inferior-ess-send-input)))))) "\n"))))
+     (let* ((tmp-file (org-babel-temp-file "R-")))
+       (with-temp-file tmp-file
+	 (insert (concat body "\n" org-babel-R-eoe-indicator)))
+       (with-current-buffer session
+	 (let* ((process (get-buffer-process (current-buffer)))
+		(string-buffer "")
+		(comint-output-filter-functions
+		 (cons (lambda (text) (setq string-buffer
+					    (concat string-buffer text)))
+		       comint-output-filter-functions)))
+	   (ess-send-string
+	    process (format "source('%s', print.eval=TRUE)"
+			    (org-babel-process-file-name tmp-file 'noquote)))
+	   (while (not (string-match (regexp-quote org-babel-R-eoe-output)
+				     string-buffer))
+	     (accept-process-output process))
+	   (substring string-buffer 0 (match-beginning 0))))))))
 
 (defun org-babel-R-process-value-result (result column-names-p)
   "R-specific processing of return value.