diff --git a/wp-admin/admin-functions.php b/wp-admin/admin-functions.php
index 0828d677f0..23eade17a7 100644
--- a/wp-admin/admin-functions.php
+++ b/wp-admin/admin-functions.php
@@ -966,14 +966,6 @@ function touch_time($edit = 1, $for_post = 1) {
 
 }
 
-function check_admin_referer() {
-	$adminurl = strtolower(get_settings('siteurl')).'/wp-admin';
-	$referer = strtolower($_SERVER['HTTP_REFERER']);
-	if (!strstr($referer, $adminurl))
-		die(__('Sorry, you need to <a href="http://codex.wordpress.org/Enable_Sending_Referrers">enable sending referrers</a> for this feature to work.'));
-	do_action('check_admin_referer');
-}
-
 // insert_with_markers: Owen Winkler, fixed by Eric Anderson
 // Inserts an array of strings into a file (.htaccess), placing it between
 // BEGIN and END markers.  Replaces existing marked info.  Retains surrounding
diff --git a/wp-includes/pluggable-functions.php b/wp-includes/pluggable-functions.php
index e4b131d2dd..bcaa9a8879 100644
--- a/wp-includes/pluggable-functions.php
+++ b/wp-includes/pluggable-functions.php
@@ -223,6 +223,16 @@ function auth_redirect() {
 }
 endif;
 
+if ( !function_exists('check_admin_referer') ) :
+function check_admin_referer() {
+	$adminurl = strtolower(get_settings('siteurl')).'/wp-admin';
+	$referer = strtolower($_SERVER['HTTP_REFERER']);
+	if (!strstr($referer, $adminurl))
+		die(__('Sorry, you need to <a href="http://codex.wordpress.org/Enable_Sending_Referrers">enable sending referrers</a> for this feature to work.'));
+	do_action('check_admin_referer');
+}
+endif;
+
 // Cookie safe redirect.  Works around IIS Set-Cookie bug.
 // http://support.microsoft.com/kb/q176113/
 if ( !function_exists('wp_redirect') ) :