diff --git a/pageserver/src/basebackup.rs b/pageserver/src/basebackup.rs
index d2698a7022..60a5213860 100644
--- a/pageserver/src/basebackup.rs
+++ b/pageserver/src/basebackup.rs
@@ -238,6 +238,9 @@ impl<'a> Basebackup<'a> {
         info!("pg_control.state = {}", pg_control.state);
         pg_control.state = pg_constants::DB_SHUTDOWNED;
 
+		// add zenith.signal file
+        self.ar.append(&new_tar_header("zenith.signal", 0)?, &b""[..])?;
+
         //send pg_control
         let pg_control_bytes = pg_control.encode();
         let header = new_tar_header("global/pg_control", pg_control_bytes.len() as u64)?;
diff --git a/vendor/postgres b/vendor/postgres
index 044647e499..a08f50cba2 160000
--- a/vendor/postgres
+++ b/vendor/postgres
@@ -1 +1 @@
-Subproject commit 044647e49971afd96a77f77c65cfa4532543a51d
+Subproject commit a08f50cba293fff045cb771f8c6bb23b89f4f7f7