diff --git a/src/bin/pg_validatebackup/Makefile b/src/bin/pg_validatebackup/Makefile
index 04ef7d3051..b1c2b7c1be 100644
--- a/src/bin/pg_validatebackup/Makefile
+++ b/src/bin/pg_validatebackup/Makefile
@@ -31,6 +31,7 @@ uninstall:
 
 clean distclean maintainer-clean:
 	rm -f pg_validatebackup$(X) $(OBJS)
+	rm -rf tmp_check
 
 check:
 	$(prove_check)