diff --git a/photoprism/README.md b/photoprism/README.md
index 3bc87f666..9ba937d93 100644
--- a/photoprism/README.md
+++ b/photoprism/README.md
@@ -40,6 +40,7 @@ Options can be configured through two ways :
 - Addon options
 
 ```yaml
+DB_TYPE: "list(sqlite|mariadb_addon)" # Mariadb is automatically configured is the addon is installed, sqlite does not need configuration
 localdisks: sda1 #put the hardware name of your drive to mount separated by commas, or its label. Ex: sda1, sdb1, MYNAS...
 networkdisks: "//SERVER/SHARE" # optional, list of smb servers to mount, separated by commas
 cifsusername: "username" # optional, smb username, same for all smb shares