diff --git a/openflexure_microscope/api/v2/blueprints/tasks.py b/openflexure_microscope/api/v2/blueprints/tasks.py
index 123ececa..cf841bb2 100644
--- a/openflexure_microscope/api/v2/blueprints/tasks.py
+++ b/openflexure_microscope/api/v2/blueprints/tasks.py
@@ -138,7 +138,7 @@ class TaskAPI(MethodView):
         """
 
         try:
-            task = tasks[task_id]
+            task = tasks.tasks()[task_id]
         except KeyError:
             return abort(404)  # 404 Not Found