diff --git a/rest_framework_json_api/metadata.py b/rest_framework_json_api/metadata.py
index 8306a9dd..f5bc4010 100644
--- a/rest_framework_json_api/metadata.py
+++ b/rest_framework_json_api/metadata.py
@@ -7,7 +7,7 @@
 from rest_framework.settings import api_settings
 from rest_framework.utils.field_mapping import ClassLookupDict
 
-from rest_framework_json_api.utils import get_related_resource_type
+from rest_framework_json_api.utils import get_related_resource_type, format_value
 
 
 class JSONAPIMetadata(SimpleMetadata):
@@ -83,7 +83,7 @@ def get_serializer_info(self, serializer):
         serializer.fields.pop(api_settings.URL_FIELD_NAME, None)
 
         return OrderedDict([
-            (field_name, self.get_field_info(field))
+            (format_value(field_name), self.get_field_info(field))
             for field_name, field in serializer.fields.items()
         ])