diff --git a/doc/source/reference/external-mariadb-guide.rst b/doc/source/reference/external-mariadb-guide.rst
index 7d34db6593c79b779cfc6ec4bd3daa50e7be2949..144510a492848c8365941a51cd1ea4b10a41f33f 100644
--- a/doc/source/reference/external-mariadb-guide.rst
+++ b/doc/source/reference/external-mariadb-guide.rst
@@ -211,6 +211,6 @@ all you need to do is the following:
 
 .. code-block:: console
 
-  sed -i -r -e 's/([a-z_]{0,}database_password:+)$/\1 mycommonpass/gi' /etc/kolla/passwords.yml
+  sed -i -r -e 's/([a-z_]{0,}database_password:+)(.*)$/\1 mycommonpass/gi' /etc/kolla/passwords.yml
 
 .. end
\ No newline at end of file