diff --git a/lisp/org.el b/lisp/org.el
index 2a6503f82..90540b1a6 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -9828,6 +9828,10 @@ onto the ring."
 
 
 ;;; Following file links
+(declare-function mailcap-parse-mailcaps "mailcap" (&optional path force))
+(declare-function mailcap-extension-to-mime "mailcap" (extn))
+(declare-function mailcap-mime-info
+		  "mailcap" (string &optional request no-decode))
 (defvar org-wait nil)
 (defun org-open-file (path &optional in-emacs line search)
   "Open the file at PATH.