diff --git a/Documentation/CodingStyle b/Documentation/CodingStyle
index 618a33c940df6634165da1e0717f911473c74a39..449a8a19fc21fd12582e4ab144549740bd6dd4c3 100644
--- a/Documentation/CodingStyle
+++ b/Documentation/CodingStyle
@@ -527,6 +527,7 @@ values.  To do the latter, you can stick the following in your .emacs file:
                          (string-match (expand-file-name "~/src/linux-trees")
                                        filename))
                 (setq indent-tabs-mode t)
+                (setq show-trailing-whitespace t)
                 (c-set-style "linux-tabs-only")))))
 
 This will make emacs go better with the kernel coding style for C