diff --git a/requests/models.py b/requests/models.py
index 727654c8..0f8f423d 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -821,16 +821,16 @@ class Response(object):
             raise self.error
 
         if (self.status_code >= 300) and (self.status_code < 400) and not allow_redirects:
-            http_error = HTTPError('%s Redirection' % self.status_code)
+            http_error = HTTPError('%s Redirection: %s' % (self.status_code, self.reason))
             http_error.response = self
             raise http_error
 
         elif (self.status_code >= 400) and (self.status_code < 500):
-            http_error = HTTPError('%s Client Error' % self.status_code)
+            http_error = HTTPError('%s Client Error: %s' % (self.status_code, self.reason))
             http_error.response = self
             raise http_error
 
         elif (self.status_code >= 500) and (self.status_code < 600):
-            http_error = HTTPError('%s Server Error' % self.status_code)
+            http_error = HTTPError('%s Server Error: %s' % (self.status_code, self.reason))
             http_error.response = self
             raise http_error