diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 54b635c85e..345e1ba8c6 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -753,9 +753,8 @@ function get_num_queries() {
 	return $wpdb->num_queries;
 }
 
-function bool_from_yn($yn) {
-		if (strtoupper( $yn ) == 'Y') return 1;
-		return 0;
+function bool_from_yn( $yn ) {
+	return ( strtolower( $yn ) == 'y' );
 }
 
 function do_feed() {