diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index f17f834..b47c852 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -3282,6 +3282,8 @@ InstallXLogFileSegment(XLogSegNo *segno, char *tmppath,
 	}
 #endif
 
+	fsync_fname("pg_xlog", true);
+
 	if (use_lock)
 		LWLockRelease(ControlFileLock);