diff --git a/requests/exceptions.py b/requests/exceptions.py
index 16acd925..d20a95cd 100644
--- a/requests/exceptions.py
+++ b/requests/exceptions.py
@@ -15,8 +15,8 @@ class RequestException(Exception):
 class HTTPError(RequestException):
     """An HTTP error occured."""
 
-class AuthenticationError(RequestException):
-    """The authentication credentials provided were invalid."""
+class ConnectionError(RequestException):
+    """A Connection error occured."""
 
 class Timeout(RequestException):
     """The request timed out."""