diff --git a/contrib/pg_prewarm/autoprewarm.c b/contrib/pg_prewarm/autoprewarm.c
index 3a4cc5b1722..f99f9c07af3 100644
--- a/contrib/pg_prewarm/autoprewarm.c
+++ b/contrib/pg_prewarm/autoprewarm.c
@@ -767,6 +767,8 @@ apw_init_shmem(void)
 	}
 	LWLockRelease(AddinShmemInitLock);
 
+	LWLockRegisterTranche(apw_state->lock.tranche, "autoprewarm");
+
 	return found;
 }