diff --git a/wp-includes/default-widgets.php b/wp-includes/default-widgets.php
index 9b7addfa3..c1b741ac9 100644
--- a/wp-includes/default-widgets.php
+++ b/wp-includes/default-widgets.php
@@ -590,6 +590,7 @@ class WP_Widget_Recent_Posts extends WP_Widget {
 
 		<p><label for="<?php echo $this->get_field_id('number'); ?>"><?php _e('Number of posts to show:'); ?></label>
 		<input id="<?php echo $this->get_field_id('number'); ?>" name="<?php echo $this->get_field_name('number'); ?>" type="text" value="<?php echo $number; ?>" size="3" /></p>
+		<small><?php _e('(at most 15)'); ?></small>
 <?php
 	}
 }