diff --git a/wp-includes/comment.php b/wp-includes/comment.php
index 93ff1876dc..efcf384815 100644
--- a/wp-includes/comment.php
+++ b/wp-includes/comment.php
@@ -496,7 +496,7 @@ function delete_comment_meta( $comment_id, $meta_key, $meta_value = '' ) {
  *                           This parameter has no effect if $key is not specified.
  *                           Default false.
  * @return mixed An array if $single is false. The value of meta data field
- *               if $single is true.
+ *               if $single is true. False for an invalid $comment_id.
  */
 function get_comment_meta( $comment_id, $key = '', $single = false ) {
 	return get_metadata( 'comment', $comment_id, $key, $single );
diff --git a/wp-includes/ms-site.php b/wp-includes/ms-site.php
index 7070baefd9..b90dde3cd0 100644
--- a/wp-includes/ms-site.php
+++ b/wp-includes/ms-site.php
@@ -1087,7 +1087,7 @@ function delete_site_meta( $site_id, $meta_key, $meta_value = '' ) {
  *                        This parameter has no effect if $key is not specified.
  *                        Default false.
  * @return mixed An array if $single is false. The value of meta data field
- *               if $single is true.
+ *               if $single is true. False for an invalid $site_id.
  */
 function get_site_meta( $site_id, $key = '', $single = false ) {
 	return get_metadata( 'blog', $site_id, $key, $single );
diff --git a/wp-includes/post.php b/wp-includes/post.php
index 9a1aaeeb64..d92d9617f2 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -2120,7 +2120,7 @@ function delete_post_meta( $post_id, $meta_key, $meta_value = '' ) {
  *                        This parameter has no effect if $key is not specified.
  *                        Default false.
  * @return mixed An array if $single is false. The value of the meta field
- *               if $single is true.
+ *               if $single is true. False for an invalid $post_id.
  */
 function get_post_meta( $post_id, $key = '', $single = false ) {
 	return get_metadata( 'post', $post_id, $key, $single );
diff --git a/wp-includes/taxonomy.php b/wp-includes/taxonomy.php
index e07e783528..69355a3fb0 100644
--- a/wp-includes/taxonomy.php
+++ b/wp-includes/taxonomy.php
@@ -1292,7 +1292,7 @@ function delete_term_meta( $term_id, $meta_key, $meta_value = '' ) {
  *                        This parameter has no effect if $key is not specified.
  *                        Default false.
  * @return mixed An array if $single is false. The value of the meta field
- *               if $single is true.
+ *               if $single is true. False for an invalid $term_id.
  */
 function get_term_meta( $term_id, $key = '', $single = false ) {
 	return get_metadata( 'term', $term_id, $key, $single );
diff --git a/wp-includes/user.php b/wp-includes/user.php
index 28f1583a90..4994563d08 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -831,7 +831,7 @@ function delete_user_meta( $user_id, $meta_key, $meta_value = '' ) {
  *                        This parameter has no effect if $key is not specified.
  *                        Default false.
  * @return mixed An array if $single is false. The value of meta data field
- *               if $single is true.
+ *               if $single is true. False for an invalid $user_id.
  */
 function get_user_meta( $user_id, $key = '', $single = false ) {
 	return get_metadata( 'user', $user_id, $key, $single );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 04e6bb325c..fb55dd44f1 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta4-48657';
+$wp_version = '5.5-beta4-48658';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.