diff --git a/doc/Admin.md b/doc/Admin.md
index 20d16e6b..36f0d78d 100644
--- a/doc/Admin.md
+++ b/doc/Admin.md
@@ -613,6 +613,7 @@ Name | Description
 `cap-required` | When set to a true value then the command requires that users have the `can-<command name>` [capability](#user-capabilities) before they can invoke it.
 `dont-replace-pronouns` | When set to a true value then pronouns such as "my", "me", "your", etc, will not be intuitively replaced with nicks and such.
 `background-process` | When set to a true value then this command will be executed as a background process. Use this for commands that can potentially take a long time to complete.
+`preserve_whitespace` | When set to a true value, do not collapse ajdacent whitespace characters in command output.
 `process-timeout` | The timeout, in seconds, before the process is automatically killed. If not set then the `processmanager.default_timeout` [registry](Registry.md) value will be used.
 
 ## Event-queue management