--- a/.emacs-my	Tue Jul 04 11:38:48 2017 +0300
+++ b/.emacs-my	Mon Jul 31 17:43:35 2017 +0300
@@ -1647,10 +1647,11 @@
 
 (setq woman-use-own-frame nil)
 (setq woman-fill-frame t)
-;; I prefer EN man pages.
-(when (memq system-type '(windows-nt cygwin))
-  (setq manual-program "LANG=C man")
-  )
+
+(eval-after-load 'man
+  ;; Default sed filter failed with syntax error in native Emacs and Cygwin.
+  (when (eq system-type 'windows-nt)
+    (setq Man-filter-list nil)))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 (message "comint")