diff --git a/src/backend/Makefile b/src/backend/Makefile
index 4946d37929c..a1d3f067d77 100644
--- a/src/backend/Makefile
+++ b/src/backend/Makefile
@@ -291,7 +291,7 @@ endif
 	$(MAKE) -C tsearch uninstall-data
 	rm -f '$(DESTDIR)$(datadir)/pg_hba.conf.sample' \
 	      '$(DESTDIR)$(datadir)/pg_ident.conf.sample' \
-              '$(DESTDIR)$(datadir)/postgresql.conf.sample' \
+	      '$(DESTDIR)$(datadir)/postgresql.conf.sample' \
 	      '$(DESTDIR)$(datadir)/recovery.conf.sample'