diff --git a/web_drop_target/static/src/js/web_drop_target.js b/web_drop_target/static/src/js/web_drop_target.js
index f5aad33c..24d63bc9 100644
--- a/web_drop_target/static/src/js/web_drop_target.js
+++ b/web_drop_target/static/src/js/web_drop_target.js
@@ -111,6 +111,9 @@ odoo.define('web_drop_target', function(require) {
         ) {
             var self = this;
             var file = item;
+            if(!file || !(file instanceof Blob)) {
+                return;
+            }
             var reader = new FileReader();
             reader.onloadend = self.proxy(
                 _.partial(self._create_attachment, file, reader, e, res_model, res_id, extra_data)