diff --git a/t/t1304-default-acl.sh b/t/t1304-default-acl.sh
index b5d89a2250e41afe544b0d0f59f638e02d570cdd..2b962cfda70d998e9c2799cf8fc720b330cd118a 100755
--- a/t/t1304-default-acl.sh
+++ b/t/t1304-default-acl.sh
@@ -25,6 +25,11 @@ else
 	test_set_prereq SETFACL
 fi
 
+if test -z "$LOGNAME"
+then
+	LOGNAME=$USER
+fi
+
 check_perms_and_acl () {
 	test -r "$1" &&
 	getfacl "$1" > actual &&