diff --git a/flask/wrappers.py b/flask/wrappers.py
index df9d205c..fe0c7bcb 100644
--- a/flask/wrappers.py
+++ b/flask/wrappers.py
@@ -177,7 +177,7 @@ class Request(RequestBase):
         ctx = _request_ctx_stack.top
         if ctx is not None:
             if ctx.app.config.get('DEBUG', False):
-                raise BadRequest('No JSON object could be decoded')
+                raise BadRequest('Failed to decode JSON object: {}'.format(e))
         raise BadRequest()
 
     def _load_form_data(self):
diff --git a/tests/test_helpers.py b/tests/test_helpers.py
index 5867ab65..8d09327f 100644
--- a/tests/test_helpers.py
+++ b/tests/test_helpers.py
@@ -59,7 +59,7 @@ class TestJSON(object):
         c = app.test_client()
         rv = c.post('/json', data=None, content_type='application/json')
         assert rv.status_code == 400
-        assert b'No JSON object could be decoded' in rv.data
+        assert b'Failed to decode JSON object' in rv.data
 
     def test_post_empty_json_wont_add_exception_to_response_if_no_debug(self):
         app = flask.Flask(__name__)
@@ -71,7 +71,7 @@ class TestJSON(object):
         c = app.test_client()
         rv = c.post('/json', data=None, content_type='application/json')
         assert rv.status_code == 400
-        assert b'No JSON object could be decoded' not in rv.data
+        assert b'Failed to decode JSON object' not in rv.data
 
     def test_json_bad_requests(self):
         app = flask.Flask(__name__)