diff --git a/src/backend/postmaster/bgworker.c b/src/backend/postmaster/bgworker.c
index 85a3b3a..e81dbc1 100644
--- a/src/backend/postmaster/bgworker.c
+++ b/src/backend/postmaster/bgworker.c
@@ -55,7 +55,8 @@ slist_head	BackgroundWorkerList = SLIST_STATIC_INIT(BackgroundWorkerList);
  * responsibility of the postmaster.  Regular backends may no longer modify it,
  * but the postmaster may examine it.  Thus, a backend initializing a slot
  * must fully initialize the slot - and insert a write memory barrier - before
- * marking it as in use.
+ * marking it as in use. Note that RegisterDynamicBackgroundWorker() handles
+ * in_use correctly for you.
  *
  * As an exception, however, even when the slot is in use, regular backends
  * may set the 'terminate' flag for a slot, telling the postmaster not