diff --git a/rapids/templates/rapids/rapid_form.html b/rapids/templates/rapids/rapid_form.html
index 283d3112..4aaad48b 100755
--- a/rapids/templates/rapids/rapid_form.html
+++ b/rapids/templates/rapids/rapid_form.html
@@ -576,7 +576,7 @@
             "detail": image_set
         });
 
-        if (active_file_inputs.length < 1) {
+        if (active_file_inputs.size < 1) {
             window.dispatchEvent(event);
         }
         sortable('.sortable');