diff --git a/seminar/templates/seminar/odevzdavatko/detail.html b/seminar/templates/seminar/odevzdavatko/detail.html
index 3bd4e93b..dadeff41 100644
--- a/seminar/templates/seminar/odevzdavatko/detail.html
+++ b/seminar/templates/seminar/odevzdavatko/detail.html
@@ -26,8 +26,9 @@ function deleteForm(prefix, btn) {
     if (total >= 1){
         btn.closest('tr').remove();
         var forms = $('.hodnoceni');
-        $('#id_' + prefix + '-TOTAL_FORMS').val(forms.length);
-        for (var i=0, formCount=forms.length; i<formCount; i++) {
+        var formCount = forms.length - 1; // There is one extra such form hidden as template!
+        $('#id_' + prefix + '-TOTAL_FORMS').val(formCount);
+        for (var i=0; i<formCount; i++) {
             $(forms.get(i)).find(':input').each(function() {
                 updateElementIndex(this, prefix, i);
             });