diff --git a/mayan/apps/document_indexing/forms.py b/mayan/apps/document_indexing/forms.py
index 90b0e6b158..4f4977f911 100644
--- a/mayan/apps/document_indexing/forms.py
+++ b/mayan/apps/document_indexing/forms.py
@@ -2,6 +2,9 @@ from __future__ import absolute_import
 
 from django import forms
 
+from common.classes import ModelAttribute
+from documents.models import Document
+
 from .models import Index, IndexTemplateNode
 
 
@@ -22,6 +25,7 @@ class IndexTemplateNodeForm(forms.ModelForm):
         super(IndexTemplateNodeForm, self).__init__(*args, **kwargs)
         self.fields['index'].widget = forms.widgets.HiddenInput()
         self.fields['parent'].widget = forms.widgets.HiddenInput()
+        self.fields['expression'].help_text = ' '.join([unicode(self.fields['expression'].help_text), ModelAttribute.help_text_for(Document, type_names=['indexing'])])
 
     class Meta:
         model = IndexTemplateNode