diff --git wp-includes/general-template.php wp-includes/general-template.php
index c7634bd..50faa5d 100644
--- wp-includes/general-template.php
+++ wp-includes/general-template.php
@@ -197,6 +197,21 @@ function wp_loginout($redirect = '', $echo = true) {
 }
 
 /**
+ * Returns the user registration URL
+ *
+ * Returns the URL that allows the user to log in to the site
+ *
+ * @since 3.3.0
+ * @uses site_url() To generate the log in URL
+ * @uses apply_filters() calls 'register_url' hook on final url
+ *
+ * @return string
+ */
+function wp_register_url() {
+	return apply_filters( 'register_url', site_url( 'wp-login.php?action=register', 'login' ) );
+}
+
+/**
  * Returns the Log Out URL.
  *
  * Returns the URL that allows the user to log out of the site
@@ -338,7 +353,7 @@ function wp_register( $before = '<li>', $after = '</li>', $echo = true ) {
 
 	if ( ! is_user_logged_in() ) {
 		if ( get_option('users_can_register') )
-			$link = $before . '<a href="' . site_url('wp-login.php?action=register', 'login') . '">' . __('Register') . '</a>' . $after;
+			$link = $before . '<a href="' . esc_url( wp_register_url() ) . '">' . __('Register') . '</a>' . $after;
 		else
 			$link = '';
 	} else {
diff --git wp-login.php wp-login.php
index 5d4f3f7..bb46008 100644
--- wp-login.php
+++ wp-login.php
@@ -448,7 +448,7 @@ case 'retrievepassword' :
 <p id="nav">
 <a href="<?php echo esc_url( wp_login_url() ); ?>"><?php _e('Log in') ?></a>
 <?php if ( get_option( 'users_can_register' ) ) : ?>
- | <a href="<?php echo esc_url( site_url( 'wp-login.php?action=register', 'login' ) ); ?>"><?php _e( 'Register' ); ?></a>
+ | <a href="<?php echo esc_url( wp_register_url() ); ?>"><?php _e( 'Register' ); ?></a>
 <?php endif; ?>
 </p>
 
@@ -507,7 +507,7 @@ case 'rp' :
 <p id="nav">
 <a href="<?php echo esc_url( wp_login_url() ); ?>"><?php _e( 'Log in' ); ?></a>
 <?php if ( get_option( 'users_can_register' ) ) : ?>
- | <a href="<?php echo esc_url( site_url( 'wp-login.php?action=register', 'login' ) ); ?>"><?php _e( 'Register' ); ?></a>
+ | <a href="<?php echo esc_url( wp_register_url() ); ?>"><?php _e( 'Register' ); ?></a>
 <?php endif; ?>
 </p>