--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -3169,6 +3169,9 @@ pgstat_bestart(void)
             case StartupProcess:
                 beentry->st_backendType = B_STARTUP;
                 break;
+           case ArchiverProcess:
+               beentry->st_backendType = B_ARCHIVER;
+               break;
             case BgWriterProcess:
                 beentry->st_backendType = B_BG_WRITER;
                 break;
diff --git a/src/bin/pg_basebackup/t/010_pg_basebackup.pl