diff --git a/requests/exceptions.py b/requests/exceptions.py
index 7caf4db2..cd3c7600 100644
--- a/requests/exceptions.py
+++ b/requests/exceptions.py
@@ -7,6 +7,7 @@ requests.exceptions
 This module contains the set of Requests' exceptions.
 
 """
+from .packages.urllib3.exceptions import HTTPError as BaseHTTPError
 
 
 class RequestException(IOError):
@@ -63,5 +64,5 @@ class ChunkedEncodingError(RequestException):
     """The server declared chunked encoding but sent an invalid chunk."""
 
 
-class ContentDecodingError(RequestException):
+class ContentDecodingError(RequestException, BaseHTTPError):
     """Failed to decode response content"""