diff --git a/Documentation/CodingStyle b/Documentation/CodingStyle
index 7b5762e..72968cd 100644
--- a/Documentation/CodingStyle
+++ b/Documentation/CodingStyle
@@ -498,7 +498,8 @@
             (let ((filename (buffer-file-name)))
               ;; Enable kernel mode for the appropriate files
               (when (and filename
-                         (string-match "~/src/linux-trees" filename))
+                         (string-match (expand-file-name "~/src/linux-trees")
+                                       filename))
                 (setq indent-tabs-mode t)
                 (c-set-style "linux-tabs-only")))))