diff --git a/netbox/extras/forms/model_forms.py b/netbox/extras/forms/model_forms.py
index c02dd9748..e2a95281e 100644
--- a/netbox/extras/forms/model_forms.py
+++ b/netbox/extras/forms/model_forms.py
@@ -59,7 +59,8 @@ class CustomFieldForm(forms.ModelForm):
     )
     related_object_filter = JSONField(
         label=_('Related object filter'),
-        required=False
+        required=False,
+        help_text=_('Specify query parameters as a JSON object.')
     )
     choice_set = DynamicModelChoiceField(
         queryset=CustomFieldChoiceSet.objects.all()