diff --git a/src/calibre/srv/loop.py b/src/calibre/srv/loop.py
index 77483ceabc..6ff179327f 100644
--- a/src/calibre/srv/loop.py
+++ b/src/calibre/srv/loop.py
@@ -212,6 +212,8 @@ class Connection(object):  # {{{
                 self.ready = False
                 return b''
             return data
+        except ssl.SSLWantReadError:
+            return b''
         except socket.error as e:
             if e.errno in socket_errors_nonblocking or e.errno in socket_errors_eintr:
                 return b''