diff --git a/protocoloadm/views.py b/protocoloadm/views.py
index 87f0684b9..cab17a4ab 100644
--- a/protocoloadm/views.py
+++ b/protocoloadm/views.py
@@ -493,7 +493,7 @@ class ProtocoloDocumentoView(FormMixin, GenericView):
             else:
                 numeracao = Protocolo.objects.all().aggregate(Max('numero'))
 
-            if numeracao is None:
+            if numeracao['numero__max'] is None:
                 numeracao['numero__max'] = 0
 
             protocolo = Protocolo()