diff --git a/job.c b/job.c
index 7365db8..9500b5b 100644
--- a/job.c
+++ b/job.c
@@ -125,7 +125,17 @@
     }
 }
 
-void job_txn_add_job(JobTxn *txn, Job *job)
+/**
+ * @txn: The transaction (may be NULL)
+ * @job: Job to add to the transaction
+ *
+ * Add @job to the transaction.  The @job must not already be in a transaction.
+ * The caller must call either job_txn_unref() or job_completed() to release
+ * the reference that is automatically grabbed here.
+ *
+ * If @txn is NULL, the function does nothing.
+ */
+static void job_txn_add_job(JobTxn *txn, Job *job)
 {
     if (!txn) {
         return;
@@ -427,12 +437,18 @@
     progress_increase_remaining(&job->progress, delta);
 }
 
-void job_event_cancelled(Job *job)
+/**
+ * To be called when a cancelled job is finalised.
+ */
+static void job_event_cancelled(Job *job)
 {
     notifier_list_notify(&job->on_finalize_cancelled, job);
 }
 
-void job_event_completed(Job *job)
+/**
+ * To be called when a successfully completed job is finalised.
+ */
+static void job_event_completed(Job *job)
 {
     notifier_list_notify(&job->on_finalize_completed, job);
 }