diff --git a/master-docker-nonstandard/master.cfg b/master-docker-nonstandard/master.cfg
index 819b31e2..0ab1d810 100644
--- a/master-docker-nonstandard/master.cfg
+++ b/master-docker-nonstandard/master.cfg
@@ -1291,7 +1291,7 @@ f_eco_php.addStep(
                 """
                 "/buildbot/installdb.sh " """
                 + os.getenv("ARTIFACTS_URL", default="https://ci.mariadb.org")
-                + """/%(prop:tarbuildnum)s/%(prop:parentbuildername)s/%(prop:mariadb_binary)s" --plugin-load-add=auth  _pam --pam_use_cleartext_plugin"
+                + """/%(prop:tarbuildnum)s/%(prop:parentbuildername)s/%(prop:mariadb_binary)s" --plugin-load-add=auth_pam --pam_use_cleartext_plugin"
             """
             ),
         ],