diff --git a/src/api2/types/tape/media_pool.rs b/src/api2/types/tape/media_pool.rs
index 328f3591..aa6da0cf 100644
--- a/src/api2/types/tape/media_pool.rs
+++ b/src/api2/types/tape/media_pool.rs
@@ -145,7 +145,7 @@ pub struct MediaPoolConfig {
     /// Media retention policy
     #[serde(skip_serializing_if="Option::is_none")]
     pub retention: Option<String>,
-    /// Media set naming template (default "%id%")
+    /// Media set naming template (default "%c")
     ///
     /// The template is UTF8 text, and can include strftime time
     /// format specifications.
diff --git a/src/tape/inventory.rs b/src/tape/inventory.rs
index cc3872fd..e86cd66a 100644
--- a/src/tape/inventory.rs
+++ b/src/tape/inventory.rs
@@ -522,7 +522,7 @@ impl Inventory {
     ) -> Result<String, Error> {
 
         if let Some(ctime) = self.media_set_start_time(media_set_uuid) {
-            let mut template = template.unwrap_or(String::from("%id%"));
+            let mut template = template.unwrap_or(String::from("%c"));
             template = template.replace("%id%", &media_set_uuid.to_string());
             proxmox::tools::time::strftime_local(&template, ctime)
         } else {