diff --git a/wp-admin/includes/class-wp-filesystem-direct.php b/wp-admin/includes/class-wp-filesystem-direct.php
index 1e4cb50a28..f8979c2ac9 100644
--- a/wp-admin/includes/class-wp-filesystem-direct.php
+++ b/wp-admin/includes/class-wp-filesystem-direct.php
@@ -394,7 +394,7 @@ class WP_Filesystem_Direct extends WP_Filesystem_Base {
 	/**
 	 * @param string $path
 	 * @param bool $recursive
-	 * @return type
+	 * @return bool
 	 */
 	public function rmdir($path, $recursive = false) {
 		return $this->delete($path, $recursive);
diff --git a/wp-admin/includes/class-wp-filesystem-ftpext.php b/wp-admin/includes/class-wp-filesystem-ftpext.php
index 90e3de0274..79bf0bff71 100644
--- a/wp-admin/includes/class-wp-filesystem-ftpext.php
+++ b/wp-admin/includes/class-wp-filesystem-ftpext.php
@@ -89,7 +89,7 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
 
 	/**
 	 * @param string $file
-	 * @return bool|string
+	 * @return false|string
 	 */
 	public function get_contents( $file ) {
 		$tempfile = wp_tempnam($file);
diff --git a/wp-admin/includes/class-wp-filesystem-ftpsockets.php b/wp-admin/includes/class-wp-filesystem-ftpsockets.php
index bb7e0c2e62..df716500a4 100644
--- a/wp-admin/includes/class-wp-filesystem-ftpsockets.php
+++ b/wp-admin/includes/class-wp-filesystem-ftpsockets.php
@@ -83,7 +83,7 @@ class WP_Filesystem_ftpsockets extends WP_Filesystem_Base {
 
 	/**
 	 * @param string $file
-	 * @return bool|string
+	 * @return false|string
 	 */
 	public function get_contents( $file ) {
 		if ( ! $this->exists($file) )
diff --git a/wp-admin/includes/class-wp-filesystem-ssh2.php b/wp-admin/includes/class-wp-filesystem-ssh2.php
index dbfe707132..10872a5830 100644
--- a/wp-admin/includes/class-wp-filesystem-ssh2.php
+++ b/wp-admin/includes/class-wp-filesystem-ssh2.php
@@ -126,6 +126,7 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 	/**
 	 * @param string $command
 	 * @param bool $returnbool
+	 * @return bool|string
 	 */
 	public function run_command( $command, $returnbool = false) {
 
@@ -192,7 +193,7 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 
 	/**
 	 * @param string $dir
-	 * @return bool
+	 * @return bool|string
 	 */
 	public function chdir($dir) {
 		return $this->run_command('cd ' . $dir, true);
@@ -215,7 +216,7 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 	 * @param string $file
 	 * @param int $mode
 	 * @param bool $recursive
-	 * @return bool
+	 * @return bool|string
 	 */
 	public function chmod($file, $mode = false, $recursive = false) {
 		if ( ! $this->exists($file) )
diff --git a/wp-admin/includes/class-wp-posts-list-table.php b/wp-admin/includes/class-wp-posts-list-table.php
index 76aa1e5b0b..90a9f4c67c 100644
--- a/wp-admin/includes/class-wp-posts-list-table.php
+++ b/wp-admin/includes/class-wp-posts-list-table.php
@@ -429,7 +429,7 @@ class WP_Posts_List_Table extends WP_List_Table {
 	 * @param array $pages
 	 * @param int $pagenum
 	 * @param int $per_page
-	 * @return bool|null
+	 * @return false|null
 	 */
 	private function _display_rows_hierarchical( $pages, $pagenum = 1, $per_page = 20 ) {
 		global $wpdb;