diff --git a/3.0-HISTORY.rst b/3.0-HISTORY.rst
index 4c4c84df..a65aad1f 100644
--- a/3.0-HISTORY.rst
+++ b/3.0-HISTORY.rst
@@ -23,6 +23,10 @@
 
 - Streaming responses with ``Response.iter_lines`` or ``Response.iter_content``
   now requires an encoding to be set if one isn't provided by the server.
+  
+- Exception raised during read timeout for ``Response.iter_content`` and 
+  ``Response.iter_lines`` changed from ``ConnectionError`` to more 
+  specific ``ReadTimeout``.
 
 - Raise exception if multiple locations are returned during a redirect.
 
diff --git a/requests/models.py b/requests/models.py
index 8eab3f64..e776bc34 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -33,7 +33,7 @@ from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
 from .exceptions import (
     HTTPError, MissingScheme, InvalidURL, ChunkedEncodingError,
     ContentDecodingError, ConnectionError, StreamConsumedError,
-    InvalidHeader, InvalidBodyError)
+    InvalidHeader, InvalidBodyError, ReadTimeout)
 from ._internal_utils import to_native_string, unicode_is_ascii
 from .utils import (
     guess_filename, get_auth_from_url, requote_uri,
@@ -742,7 +742,7 @@ class Response(object):
                 except DecodeError as e:
                     raise ContentDecodingError(e)
                 except ReadTimeoutError as e:
-                    raise ConnectionError(e)
+                    raise ReadTimeout(e)
             else:
                 # Standard file-like object.
                 while True: