diff --git a/gcloud/exceptions.py b/gcloud/exceptions.py
index f42d2806f3fe..b1072bbf134d 100644
--- a/gcloud/exceptions.py
+++ b/gcloud/exceptions.py
@@ -151,6 +151,11 @@ class MethodNotImplemented(ServerError):
     code = 501
 
 
+class BadGateway(ServerError):
+    """Exception mapping a '502 Bad Gateway' response."""
+    code = 502
+
+
 class ServiceUnavailable(ServerError):
     """Exception mapping a '503 Service Unavailable' response."""
     code = 503