diff --git a/src/api2/admin/datastore.rs b/src/api2/admin/datastore.rs
index 049e16ed..ae553eb0 100644
--- a/src/api2/admin/datastore.rs
+++ b/src/api2/admin/datastore.rs
@@ -509,32 +509,30 @@ fn start_garbage_collection(
     Ok(json!(upid_str))
 }
 
-#[sortable]
-pub const API_METHOD_GARBAGE_COLLECTION_STATUS: ApiMethod = ApiMethod::new(
-    &ApiHandler::Sync(&garbage_collection_status),
-    &ObjectSchema::new(
-        "Garbage collection status.",
-        &sorted!([
-            ("store", false, &DATASTORE_SCHEMA),
-        ])
-    )
-);
-
+#[api(
+    input: {
+        properties: {
+            store: {
+                schema: DATASTORE_SCHEMA,
+            },
+        },
+    },
+    returns: {
+        type: GarbageCollectionStatus,
+    }
+)]
+/// Garbage collection status.
 fn garbage_collection_status(
-    param: Value,
+    store: String,
     _info: &ApiMethod,
     _rpcenv: &mut dyn RpcEnvironment,
-) -> Result<Value, Error> {
-
-    let store = param["store"].as_str().unwrap();
+) -> Result<GarbageCollectionStatus, Error> {
 
     let datastore = DataStore::lookup_datastore(&store)?;
 
-    println!("Garbage collection status on store {}", store);
-
     let status = datastore.last_gc_status();
 
-    Ok(serde_json::to_value(&status)?)
+    Ok(status)
 }
 
 
diff --git a/src/api2/types.rs b/src/api2/types.rs
index 393c32a6..268ef6ed 100644
--- a/src/api2/types.rs
+++ b/src/api2/types.rs
@@ -276,6 +276,48 @@ pub struct BackupContent {
     pub size: Option<u64>,
 }
 
+#[api(
+    properties: {
+        "upid": {
+            optional: true,
+            schema: UPID_SCHEMA,
+        },
+    },
+)]
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(rename_all="kebab-case")]
+/// Garbage collection status.
+pub struct GarbageCollectionStatus {
+    pub upid: Option<String>,
+    /// Number of processed index files.
+    pub index_file_count: usize,
+    /// Sum of bytes referred by index files.
+    pub index_data_bytes: u64,
+    /// Bytes used on disk.
+    pub disk_bytes: u64,
+    /// Chunks used on disk.
+    pub disk_chunks: usize,
+    /// Sum of removed bytes.
+    pub removed_bytes: u64,
+    /// Number of removed chunks.
+    pub removed_chunks: usize,
+}
+
+impl Default for GarbageCollectionStatus {
+    fn default() -> Self {
+        GarbageCollectionStatus {
+            upid: None,
+            index_file_count: 0,
+            index_data_bytes: 0,
+            disk_bytes: 0,
+            disk_chunks: 0,
+            removed_bytes: 0,
+            removed_chunks: 0,
+        }
+    }
+}
+
+
 #[api()]
 #[derive(Serialize, Deserialize)]
 /// Storage space usage information.
diff --git a/src/backup/chunk_store.rs b/src/backup/chunk_store.rs
index 76a2b3bc..fa9c2710 100644
--- a/src/backup/chunk_store.rs
+++ b/src/backup/chunk_store.rs
@@ -4,39 +4,15 @@ use std::path::{Path, PathBuf};
 use std::io::Write;
 use std::sync::{Arc, Mutex};
 use std::os::unix::io::AsRawFd;
-use serde::Serialize;
 
 use proxmox::tools::fs::{CreateOptions, create_path, create_dir};
 
 use crate::tools;
+use crate::api2::types::GarbageCollectionStatus;
+
 use super::DataBlob;
 use crate::server::WorkerTask;
 
-#[derive(Clone, Serialize)]
-pub struct GarbageCollectionStatus {
-    pub upid: Option<String>,
-    pub index_file_count: usize,
-    pub index_data_bytes: u64,
-    pub disk_bytes: u64,
-    pub disk_chunks: usize,
-    pub removed_bytes: u64,
-    pub removed_chunks: usize,
-}
-
-impl Default for GarbageCollectionStatus {
-    fn default() -> Self {
-        GarbageCollectionStatus {
-            upid: None,
-            index_file_count: 0,
-            index_data_bytes: 0,
-            disk_bytes: 0,
-            disk_chunks: 0,
-            removed_bytes: 0,
-            removed_chunks: 0,
-        }
-    }
-}
-
 /// File system based chunk store
 pub struct ChunkStore {
     name: String, // used for error reporting
diff --git a/src/backup/datastore.rs b/src/backup/datastore.rs
index 47eb1b52..d4ee7dd4 100644
--- a/src/backup/datastore.rs
+++ b/src/backup/datastore.rs
@@ -8,7 +8,7 @@ use lazy_static::lazy_static;
 use chrono::{DateTime, Utc};
 
 use super::backup_info::{BackupGroup, BackupDir};
-use super::chunk_store::{ChunkStore, GarbageCollectionStatus};
+use super::chunk_store::ChunkStore;
 use super::dynamic_index::{DynamicIndexReader, DynamicIndexWriter};
 use super::fixed_index::{FixedIndexReader, FixedIndexWriter};
 use super::manifest::{MANIFEST_BLOB_NAME, BackupManifest};
@@ -17,6 +17,7 @@ use super::{DataBlob, ArchiveType, archive_type};
 use crate::config::datastore;
 use crate::server::WorkerTask;
 use crate::tools;
+use crate::api2::types::GarbageCollectionStatus;
 
 lazy_static! {
     static ref DATASTORE_MAP: Mutex<HashMap<String, Arc<DataStore>>> = Mutex::new(HashMap::new());