diff --git a/sapl/templates/sessao/adicionar_varias_materias_expediente.html b/sapl/templates/sessao/adicionar_varias_materias_expediente.html
index 362ba300d..c9c8c5e5d 100644
--- a/sapl/templates/sessao/adicionar_varias_materias_expediente.html
+++ b/sapl/templates/sessao/adicionar_varias_materias_expediente.html
@@ -94,3 +94,13 @@
 {% endif %}
 
 {% endblock detail_content %}
+
+{% block extra_js %}
+	<script>
+
+		$(window).on('beforeunload', function () {
+            $("input[type=submit], input[type=button]").prop("disabled", "disabled");
+        });
+
+	</script>
+{% endblock extra_js%}