diff --git a/init.el b/init.el
index f923944..289a53a 100644
--- a/init.el
+++ b/init.el
@@ -536,10 +536,16 @@
 
 ;; handy function to toggle tabs
 (defun toggle-indent-tabs ()
-  "Toggle tabs on/off"
+  "Toggle tabs on/off."
   (interactive)
   (setq indent-tabs-mode (not indent-tabs-mode)))
 
+;;
+(defun toggle-trailing-whitespace ()
+  "Toggle trailing whitespace visualization."
+  (interactive)
+  (setq show-trailing-whitespace (not show-trailing-whitespace)))
+
 ;; handy function to regenerate tags
 (defun my/regenerate-tags ()
   "Regenerate tags using ets."