Index: wp-includes/functions.php
===================================================================
--- wp-includes/functions.php	(revision 23972)
+++ wp-includes/functions.php	(working copy)
@@ -1174,6 +1174,9 @@
  * @return string URL with nonce action added.
  */
 function wp_nonce_url( $actionurl, $action = -1, $name = '_wpnonce' ) {
+	if ( -1 == $action )
+		_doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action as the second parameter.' ), '3.6' );
+
 	$actionurl = str_replace( '&', '&', $actionurl );
 	return esc_html( add_query_arg( $name, wp_create_nonce( $action ), $actionurl ) );
 }
@@ -1207,6 +1210,9 @@
  * @return string Nonce field.
  */
 function wp_nonce_field( $action = -1, $name = "_wpnonce", $referer = true , $echo = true ) {
+	if ( -1 == $action )
+		_doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action as the first parameter.' ), '3.6' );
+
 	$name = esc_attr( $name );
 	$nonce_field = '<input type="hidden" id="' . $name . '" name="' . $name . '" value="' . wp_create_nonce( $action ) . '" />';
 
Index: wp-includes/pluggable.php
===================================================================
--- wp-includes/pluggable.php	(revision 23972)
+++ wp-includes/pluggable.php	(working copy)
@@ -829,6 +829,9 @@
  * @param string $query_arg where to look for nonce in $_REQUEST (since 2.5)
  */
 function check_ajax_referer( $action = -1, $query_arg = false, $die = true ) {
+	if ( -1 == $action )
+		_doing_it_wrong( __FUNCTION__, __( 'You should specify a nonce action to be verified by using the first parameter.' ), '3.6' );
+
 	if ( $query_arg )
 		$nonce = $_REQUEST[$query_arg];
 	else