diff --git a/railties/configs/apache.conf b/railties/configs/apache.conf
index fe68ae5d42..d3c9983451 100755
--- a/railties/configs/apache.conf
+++ b/railties/configs/apache.conf
@@ -18,6 +18,14 @@ Options +FollowSymLinks +ExecCGI
 # Example:
 #   RewriteRule ^(.*)$ dispatch.fcgi [QSA,L]
 RewriteEngine On
+
+# If your Rails application is accessed via an Alias directive,
+# then you MUST also set the RewriteBase in this htaccess file.
+#
+# Example:
+#   Alias /myrailsapp /path/to/myrailsapp/public
+#   RewriteBase /myrailsapp
+
 RewriteRule ^$ index.html [QSA]
 RewriteRule ^([^.]+)$ $1.html [QSA]
 RewriteCond %{REQUEST_FILENAME} !-f