diff --git a/lib/towerops/job_monitoring.ex b/lib/towerops/job_monitoring.ex
index 5d02f945..456e4d2e 100644
--- a/lib/towerops/job_monitoring.ex
+++ b/lib/towerops/job_monitoring.ex
@@ -18,6 +18,7 @@ defmodule Towerops.JobMonitoring do
   @doc """
   Lists all currently executing polling and discovery jobs.
   """
+  @spec list_active_jobs() :: [Job.t()]
   def list_active_jobs do
     from(j in Job,
       where: j.state == "executing",