diff --git a/rest_framework/utils/serializer_helpers.py b/rest_framework/utils/serializer_helpers.py
index 2c4407d74..d4c659e5f 100644
--- a/rest_framework/utils/serializer_helpers.py
+++ b/rest_framework/utils/serializer_helpers.py
@@ -85,7 +85,11 @@ class BoundField(object):
 
 class JSONBoundField(BoundField):
     def as_form_field(self):
-        value = json.dumps(self.value, sort_keys=True, indent=4)
+        value = self.value
+        try:
+            value = json.dumps(self.value, sort_keys=True, indent=4)
+        except TypeError:
+            pass
         return self.__class__(self._field, value, self.errors, self._prefix)