diff --git a/docs/third_party/third_party-borgmatic.de.md b/docs/third_party/third_party-borgmatic.de.md
index 39fa0b649..f621b0f5e 100644
--- a/docs/third_party/third_party-borgmatic.de.md
+++ b/docs/third_party/third_party-borgmatic.de.md
@@ -80,6 +80,7 @@ retention:
     keep_daily: 7
     keep_weekly: 4
     keep_monthly: 6
+    prefix: ""
 
 hooks:
     mysql_databases:
diff --git a/docs/third_party/third_party-borgmatic.en.md b/docs/third_party/third_party-borgmatic.en.md
index 5d988dbb7..80bd0d677 100644
--- a/docs/third_party/third_party-borgmatic.en.md
+++ b/docs/third_party/third_party-borgmatic.en.md
@@ -81,6 +81,7 @@ retention:
     keep_daily: 7
     keep_weekly: 4
     keep_monthly: 6
+    prefix: ""
 
 hooks:
     mysql_databases: