diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
index 9d13d57748..a396c2fd93 100644
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -565,6 +565,7 @@ ReceiveTarFile(PGconn *conn, PGresult *res, int rownum)
 			else
 #endif
 				tarfile = stdout;
+			strcpy(filename, "-");
 		}
 		else
 		{