diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index 81c35ee5d..73d4be7d7 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -76,7 +76,7 @@ class wpdb {
 	// ====================================================================
 	//	Format a string correctly for safe insert under all PHP conditions
 	
-	function escape($str) {
+	function escape($string) {
 		if( !$this->dbh || version_compare( phpversion(), '4.3.0' ) == '-1' )
 			return mysql_escape_string( $string );
 		else