diff --git a/heatclient/common/http.py b/heatclient/common/http.py
index 3282e2a..ee45037 100644
--- a/heatclient/common/http.py
+++ b/heatclient/common/http.py
@@ -19,6 +19,7 @@ import os
 import socket
 
 import requests
+import six
 
 from heatclient import exc
 from heatclient.openstack.common import jsonutils
@@ -113,7 +114,10 @@ class HTTPClient(object):
         dump.extend(['%s: %s' % (k, v) for k, v in resp.headers.items()])
         dump.append('')
         if resp.content:
-            dump.extend([resp.content.decode(), ''])
+            content = resp.content
+            if isinstance(content, six.binary_type):
+                content = content.decode()
+            dump.extend([content, ''])
         LOG.debug('\n'.join(dump))
 
     def _http_request(self, url, method, **kwargs):