diff --git a/lms/envs/common.py b/lms/envs/common.py
index f0051b8f3967..eb6efe83b7a4 100644
--- a/lms/envs/common.py
+++ b/lms/envs/common.py
@@ -2593,6 +2593,12 @@ def _make_locale_paths(settings):  # pylint: disable=missing-function-docstring
 
 ################################# CELERY ######################################
 
+CELERY_IMPORTS = (
+    # Since xblock-poll is not a Django app, and XBlocks don't get auto-imported
+    # by celery workers, its tasks will not get auto-discovered:
+    'poll.tasks',
+)
+
 # Message configuration
 
 CELERY_TASK_SERIALIZER = 'json'