diff --git a/src/api_data/res_find_virtual_directory.rs b/src/api_data/res_find_virtual_directory.rs
index 0e813d6..b578f8f 100644
--- a/src/api_data/res_find_virtual_directory.rs
+++ b/src/api_data/res_find_virtual_directory.rs
@@ -5,6 +5,7 @@
 use serde::{Serialize};
 use crate::data::error::ResultBoxError;
 use crate::data::user::User;
+use crate::data::group_id::GroupID;
 
 #[derive(Serialize)]
 pub struct ResultFindVirtualDirectory {
@@ -14,14 +15,14 @@ pub struct ResultFindVirtualDirectory {
 
 impl ResultFindVirtualDirectory {
     /// Construct a new instance
-    pub fn new(user: ResultBoxError<User>, group: ResultBoxError<u64>) -> ResultFindVirtualDirectory {
+    pub fn new(user: ResultBoxError<User>, group: ResultBoxError<GroupID>) -> ResultFindVirtualDirectory {
         match (user, group) {
 
             // User
             (Ok(u), _) => ResultFindVirtualDirectory { kind: "user".to_string(), id: u.id as u64 },
 
             // Group
-            (_, Ok(g)) => ResultFindVirtualDirectory { kind: "group".to_string(), id: g },
+            (_, Ok(g)) => ResultFindVirtualDirectory { kind: "group".to_string(), id: g.id() },
 
             _ => unreachable!()
         }
diff --git a/src/data/group_id.rs b/src/data/group_id.rs
index 1197296..d387781 100644
--- a/src/data/group_id.rs
+++ b/src/data/group_id.rs
@@ -2,7 +2,7 @@
 //!
 //! @author Pierre Hubert
 
-#[derive(Clone, PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq, Debug)]
 pub struct GroupID(u64);
 
 impl GroupID {
diff --git a/src/helpers/groups_helper.rs b/src/helpers/groups_helper.rs
index 18eda0c..e1acde0 100644
--- a/src/helpers/groups_helper.rs
+++ b/src/helpers/groups_helper.rs
@@ -19,11 +19,11 @@ impl GroupVisibilityLevel {
 }
 
 /// Find a group id by virtual directory
-pub fn find_by_virtual_directory(dir: &str) -> ResultBoxError<u64> {
+pub fn find_by_virtual_directory(dir: &str) -> ResultBoxError<GroupID> {
     database::QueryInfo::new(GROUPS_LIST_TABLE)
         .cond("virtual_directory", dir)
         .add_field("id")
-        .query_row(|res| res.get_u64("id"))
+        .query_row(|res| res.get_group_id("id"))
 }
 
 /// Search for group