diff --git a/src/gcal-manager.c b/src/gcal-manager.c
index bf58cccb..74b3ef4d 100644
--- a/src/gcal-manager.c
+++ b/src/gcal-manager.c
@@ -1029,6 +1029,20 @@ gcal_manager_get_source_name (GcalManager *manager,
   return e_source_get_display_name (unit->source);
 }
 
+gboolean
+gcal_manager_get_source_readonly (GcalManager *manager,
+                                  const gchar *source_uid)
+{
+  GcalManagerPrivate *priv;
+  GcalManagerUnit *unit;
+
+  g_return_val_if_fail (GCAL_IS_MANAGER (manager), FALSE);
+  priv = manager->priv;
+
+  unit = g_hash_table_lookup (priv->clients, source_uid);
+  return e_client_is_readonly (E_CLIENT (unit->client));
+}
+
 /**
  * gcal_manager_set_new_range:
  * @manager: a #GcalManager
diff --git a/src/gcal-manager.h b/src/gcal-manager.h
index f378d6c6..f536e4b2 100644
--- a/src/gcal-manager.h
+++ b/src/gcal-manager.h
@@ -73,6 +73,9 @@ gchar*         gcal_manager_add_source              (GcalManager        *manager
 const gchar*   gcal_manager_get_source_name         (GcalManager        *manager,
                                                      const gchar        *source_uid);
 
+gboolean       gcal_manager_get_source_readonly     (GcalManager        *manager,
+                                                     const gchar        *source_uid);
+
 void           gcal_manager_set_new_range           (GcalManager        *manager,
                                                      const icaltimetype *initial_date,
                                                      const icaltimetype *final_date);