diff --git a/wp-admin/includes/misc.php b/wp-admin/includes/misc.php
index 3bf91696f4..1570b74d30 100644
--- a/wp-admin/includes/misc.php
+++ b/wp-admin/includes/misc.php
@@ -654,22 +654,10 @@ function win_is_writable($path) {
     return true;
 }
 
-/**
- * Send a HTTP header to disable content type sniffing in browsers which support it.
- *
- * @link http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
- * @link http://src.chromium.org/viewvc/chrome?view=rev&revision=6985
- *
- * @since 3.0.0.
- * @return none
- */
-function send_nosniff_header() {
-	@header( 'X-Content-Type-Options: nosniff' );
-}
 /**
  * Display the default admin color scheme picker (Used in user-edit.php)
  *
- * @since 3.0
+ * @since 3.0.0
  */
 function admin_color_scheme_picker() {
 	global $_wp_admin_css_colors, $user_id; ?>
diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 0993b7574d..a462b8deda 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -4081,4 +4081,19 @@ function __return_true() {
  */
 function __return_false() {
 	return false;
-}
\ No newline at end of file
+}
+
+/**
+ * Send a HTTP header to disable content type sniffing in browsers which support it.
+ *
+ * @link http://blogs.msdn.com/ie/archive/2008/07/02/ie8-security-part-v-comprehensive-protection.aspx
+ * @link http://src.chromium.org/viewvc/chrome?view=rev&revision=6985
+ *
+ * @since 3.0.0
+ * @return none
+ */
+function send_nosniff_header() {
+	@header( 'X-Content-Type-Options: nosniff' );
+}
+
+?>
\ No newline at end of file