diff --git a/budget/web.py b/budget/web.py
index 5b10460..2a3715e 100644
--- a/budget/web.py
+++ b/budget/web.py
@@ -249,7 +249,7 @@ def list_bills():
     return render_template("list_bills.html", 
             bills=bills, member_form=MemberForm(g.project),
             bill_form=bill_form,
-            add_bill='add_bill' in request.values
+            add_bill=request.values.get('add_bill', False)
     )
 
 @main.route("/<project_id>/members/add", methods=["GET", "POST"])
@@ -300,7 +300,12 @@ def add_bill():
             db.session.commit()
 
             flash(_("The bill has been added"))
-            return redirect(url_for('.list_bills', add_bill=form.submit2.data))
+
+            args = {}
+            if form.submit2.data:
+                args['add_bill'] = True
+
+            return redirect(url_for('.list_bills', **args))
 
     return render_template("add_bill.html", form=form)