diff --git a/README.md b/README.md
index c2f3c36f..a0a88377 100644
--- a/README.md
+++ b/README.md
@@ -182,6 +182,9 @@ specified in wp-config.php.
 [See docs](http://dev.mysql.com/doc/refman/5.7/en/check-table.html)
 for more details on the `CHECK TABLE` statement.
 
+This command does not check whether WordPress is installed;
+to do that run `wp core is-installed`.
+
 **OPTIONS**
 
 	[--dbuser=<value>]