diff --git a/plugins-root/Makefile.am b/plugins-root/Makefile.am
index a36e120a..9623212e 100644
--- a/plugins-root/Makefile.am
+++ b/plugins-root/Makefile.am
@@ -26,7 +26,7 @@ TESTS = @PLUGIN_TEST@
 test:
 	perl -I $(top_builddir) -I $(top_srcdir) ../test.pl
 
-setuid_root_mode = a=rx,u+s
+setuid_root_mode = ug=rx,u+s
 
 # /* Author Coreutils team - see ACKNOWLEDGEMENTS */