diff --git a/tryton/gui/window/form.py b/tryton/gui/window/form.py
index f20c307de4..528148e0d8 100644
--- a/tryton/gui/window/form.py
+++ b/tryton/gui/window/form.py
@@ -171,6 +171,9 @@ class Form(SignalEvent):
         if obj_id:
             win = Attachment(self.model, obj_id, self.window)
             win.run()
+            value = self.screen.current_model
+            attachment_count = value.get_attachment_count(reload=True)
+            self.signal('attachment-count', attachment_count)
         else:
             self.message_state(_('No resource selected!'))
         return True
diff --git a/tryton/gui/window/view_form/model/record.py b/tryton/gui/window/view_form/model/record.py
index a42c22972b..356bb838f5 100644
--- a/tryton/gui/window/view_form/model/record.py
+++ b/tryton/gui/window/view_form/model/record.py
@@ -239,10 +239,10 @@ class ModelRecord(SignalEvent):
         self.set_default(ir_default.get_default(self.resource,
             field_name + '=' + str(value), ctx))
 
-    def get_attachment_count(self):
+    def get_attachment_count(self, reload=False):
         if not self.id:
             return 0
-        if self.attachment_count < 0:
+        if self.attachment_count < 0 or reload:
             ir_attachment = RPCProxy('ir.attachment')
             self.attachment_count = ir_attachment.search_count([
                 ('res_model', '=', self.resource),