diff --git a/app/celery/scheduled_tasks.py b/app/celery/scheduled_tasks.py
index e0c419534..f03c95511 100644
--- a/app/celery/scheduled_tasks.py
+++ b/app/celery/scheduled_tasks.py
@@ -216,8 +216,9 @@ def check_precompiled_letter_state():
     if len(letters) > 0:
         letter_ids = [str(letter.id) for letter in letters]
 
-        msg = "{} precompiled letters have been pending-virus-check for over 90 minutes. " \
-              "Notifications: {}".format(len(letters), letter_ids)
+        msg = """{} precompiled letters have been pending-virus-check for over 90 minutes. Follow runbook to resolve:
+            https://github.com/alphagov/notifications-manuals/wiki/Support-Runbook#Deal-with-letter-pending-virus-scan-for-90-minutes.
+            Notifications: {}""".format(len(letters), letter_ids)
 
         current_app.logger.exception(msg)
 
diff --git a/tests/app/celery/test_scheduled_tasks.py b/tests/app/celery/test_scheduled_tasks.py
index bb43251c6..17d465e0b 100644
--- a/tests/app/celery/test_scheduled_tasks.py
+++ b/tests/app/celery/test_scheduled_tasks.py
@@ -373,8 +373,9 @@ def test_check_precompiled_letter_state(mocker, sample_letter_template):
 
     check_precompiled_letter_state()
 
-    message = "2 precompiled letters have been pending-virus-check for over 90 minutes. " \
-              "Notifications: ['{}', '{}']".format(noti_2.id, noti_1.id)
+    message = """2 precompiled letters have been pending-virus-check for over 90 minutes. Follow runbook to resolve:
+            https://github.com/alphagov/notifications-manuals/wiki/Support-Runbook#Deal-with-letter-pending-virus-scan-for-90-minutes.
+            Notifications: ['{}', '{}']""".format(noti_2.id, noti_1.id)
 
     mock_logger.assert_called_once_with(message)
     mock_create_ticket.assert_called_with(