diff --git a/lisp/ob-core.el b/lisp/ob-core.el
index f4a8345b5..6821b6dfc 100644
--- a/lisp/ob-core.el
+++ b/lisp/ob-core.el
@@ -2979,6 +2979,7 @@ Emacs shutdown."))
 		 (member "html" ,params)
 		 (member "code" ,params)
 		 (member "pp" ,params)
+		 (member "file" ,params)
 		 (and (or (member "output" ,params)
 			  (member "raw"    ,params)
 			  (member "org"    ,params)