diff --git a/ckan/lib/dictization/model_dictize.py b/ckan/lib/dictization/model_dictize.py
index 309350e5c24..1e1475ebfd2 100644
--- a/ckan/lib/dictization/model_dictize.py
+++ b/ckan/lib/dictization/model_dictize.py
@@ -79,6 +79,7 @@ def extras_list_dictize(extras_list, context):
 
 def resource_dictize(res, context):
     resource = table_dictize(res, context)
+    resource['format'] = resource.get('format','').lower()
     extras = resource.pop("extras", None)
     if extras:
         resource.update(extras)
diff --git a/ckan/logic/action/get.py b/ckan/logic/action/get.py
index edd56409190..3a6eed93a57 100644
--- a/ckan/logic/action/get.py
+++ b/ckan/logic/action/get.py
@@ -625,7 +625,7 @@ def format_autocomplete(context, data_dict):
         .order_by('total DESC')\
         .limit(limit)
 
-    return [resource.format for resource in query]
+    return [resource.format.lower() for resource in query]
 
 def user_autocomplete(context, data_dict):
     '''Returns users containing the provided string'''