diff --git a/wp-includes/canonical.php b/wp-includes/canonical.php
index 36b28c6d89..24550531c6 100644
--- a/wp-includes/canonical.php
+++ b/wp-includes/canonical.php
@@ -28,7 +28,7 @@
  *
  * @since 2.3.0
  * @uses $wp_rewrite
- * @uses $is_iis7
+ * @uses $is_IIS
  *
  * @param string $requested_url Optional. The URL that was requested, used to
  *		figure if redirect is needed.