diff --git a/mistral/api/controllers/v2/task.py b/mistral/api/controllers/v2/task.py
index 6bdb338d3..2e75672a4 100644
--- a/mistral/api/controllers/v2/task.py
+++ b/mistral/api/controllers/v2/task.py
@@ -67,6 +67,11 @@ def _get_task_execution(id):
             ['context', 'input', 'params', 'root_execution']
         )
 
+        rest_utils.load_deferred_fields(
+            task_ex.workflow_execution.root_execution,
+            ['params']
+        )
+
         return _get_task_resource_with_result(task_ex), task_ex
 
 
diff --git a/mistral/tests/unit/api/v2/test_tasks.py b/mistral/tests/unit/api/v2/test_tasks.py
index 496900503..ddfcde89b 100644
--- a/mistral/tests/unit/api/v2/test_tasks.py
+++ b/mistral/tests/unit/api/v2/test_tasks.py
@@ -144,6 +144,7 @@ RERUN_TASK = {
 }
 
 MOCK_WF_EX = mock.MagicMock(return_value=WF_EX)
+TASK_EX.workflow_execution = WF_EX
 MOCK_TASK = mock.MagicMock(return_value=TASK_EX)
 MOCK_TASKS = mock.MagicMock(return_value=[TASK_EX])
 MOCK_EMPTY = mock.MagicMock(return_value=[])
@@ -153,6 +154,7 @@ MOCK_ERROR_ITEMS_TASK = mock.MagicMock(return_value=ERROR_ITEMS_TASK_EX)
 
 TASK_EX_WITH_PROJECT_ID = TASK_EX.get_clone()
 TASK_EX_WITH_PROJECT_ID.project_id = '<default-project>'
+TASK_EX_WITH_PROJECT_ID.workflow_execution = WF_EX
 
 
 @mock.patch.object(