diff --git a/src/models/user.rs b/src/models/user.rs
index 9f5d0f26..4d9afe1c 100644
--- a/src/models/user.rs
+++ b/src/models/user.rs
@@ -5,6 +5,8 @@ use diesel;
 use diesel::{QueryDsl, RunQueryDsl, ExpressionMethods, PgConnection};
 use schema::users;
 use db_conn::DbConn;
+use activity_pub::Actor;
+use models::instance::Instance;
 use bcrypt;
 
 pub const AUTH_COOKIE: &'static str = "user_id";
@@ -100,3 +102,17 @@ impl<'a, 'r> FromRequest<'a, 'r> for User {
             .or_forward(())
     }
 }
+
+impl Actor for User {
+    fn get_box_prefix() -> &'static str {
+        "@"
+    }
+
+    fn get_actor_id(&self) -> String {
+        self.username.to_string()
+    }
+
+    fn get_instance(&self, conn: &PgConnection) -> Instance {
+        Instance::get(conn, self.instance_id).unwrap()
+    }
+}