--- a/.emacs-my	Thu Aug 25 21:27:19 2016 +0300
+++ b/.emacs-my	Thu Aug 25 23:47:02 2016 +0300
@@ -479,6 +479,7 @@
         0 -1)                           ; -1 for stripping final \0.
        ))))
 
+(defvar cygwin-mount-table--internal)
 (defun my-dos2cygwin-path (path)
   "Convert DOS path to Cygwin according to current mount table."
   (interactive (list (read-directory-name "Enter DOS path: ")))