diff --git a/src/wp-signup.php b/src/wp-signup.php
index df163a7ae4..20ae8bc0cd 100644
--- a/src/wp-signup.php
+++ b/src/wp-signup.php
@@ -239,7 +239,17 @@ function signup_another_blog($blogname = '', $blog_title = '', $errors = '') {
 	<p><?php _e( 'If you&#8217;re not going to use a great site domain, leave it for a new user. Now have at it!' ) ?></p>
 	<form id="setupform" method="post" action="wp-signup.php">
 		<input type="hidden" name="stage" value="gimmeanotherblog" />
-		<?php do_action( 'signup_hidden_fields' ); ?>
+		<?php
+		/**
+		 * Hidden signup form fields output for creating another site.
+		 *
+		 * @since MU
+		 *
+		 * @param string $context A string describing the step of the signup process. the value can be
+		 *                        'create-another-site', 'validate-user', or 'validate-site'.
+		 */
+		do_action( 'signup_hidden_fields', 'create-another-site' );
+		?>
 		<?php show_blog_form($blogname, $blog_title, $errors); ?>
 		<p class="submit"><input type="submit" name="submit" class="submit" value="<?php esc_attr_e( 'Create Site' ) ?>" /></p>
 	</form>
@@ -330,7 +340,10 @@ function signup_user($user_name = '', $user_email = '', $errors = '') {
 	<h2><?php printf( __( 'Get your own %s account in seconds' ), $current_site->site_name ) ?></h2>
 	<form id="setupform" method="post" action="wp-signup.php">
 		<input type="hidden" name="stage" value="validate-user-signup" />
-		<?php do_action( 'signup_hidden_fields' ); ?>
+		<?php
+		//duplicate_hook
+		do_action( 'signup_hidden_fields', 'validate-user' );
+		?>
 		<?php show_user_form($user_name, $user_email, $errors); ?>
 
 		<p>
@@ -432,7 +445,10 @@ function signup_blog($user_name = '', $user_email = '', $blogname = '', $blog_ti
 		<input type="hidden" name="stage" value="validate-blog-signup" />
 		<input type="hidden" name="user_name" value="<?php echo esc_attr($user_name) ?>" />
 		<input type="hidden" name="user_email" value="<?php echo esc_attr($user_email) ?>" />
-		<?php do_action( 'signup_hidden_fields' ); ?>
+		<?php
+		//duplicate_hook
+		do_action( 'signup_hidden_fields', 'validate-site' );
+		?>
 		<?php show_blog_form($blogname, $blog_title, $errors); ?>
 		<p class="submit"><input type="submit" name="submit" class="submit" value="<?php esc_attr_e('Signup') ?>" /></p>
 	</form>