diff --git a/classes/studyplan.php b/classes/studyplan.php
index 221ddb8..28e90c8 100644
--- a/classes/studyplan.php
+++ b/classes/studyplan.php
@@ -159,6 +159,7 @@ class studyplan {
             "idnumber" => new \external_value(PARAM_TEXT, 'idnumber of curriculum'),
             "context_id" => new \external_value(PARAM_INT, 'context_id of studyplan'),
             "description" => new \external_value(PARAM_TEXT, 'description of studyplan'),
+            "descriptionformat" => new \external_value(PARAM_INT, 'description format'),
             "aggregation" => new \external_value(PARAM_TEXT, 'selected aggregator'),
             "aggregation_config" => new \external_value(PARAM_TEXT, 'config string for aggregator'),
             "aggregation_info" => aggregator::basic_structure(),
@@ -183,6 +184,7 @@ class studyplan {
             'idnumber' => $this->r->idnumber,
             'context_id' => $this->context()->id,
             'description' => $this->r->description,
+            'descriptionformat' => $this->r->descriptionformat,
             'aggregation' => $this->r->aggregation,
             'aggregation_config' => $this->aggregator->config_string(),
             'aggregation_info' => $this->aggregator->basic_model(),