diff --git a/lib/extensions.py b/lib/extensions.py
index 216d8ad2..faa8b1de 100644
--- a/lib/extensions.py
+++ b/lib/extensions.py
@@ -56,7 +56,7 @@ try:
 except ImportError:
     pass
 
-from psycopg2._psycopg import adapt, adapters, encodings, connection, cursor, lobject, Xid
+from psycopg2._psycopg import adapt, adapters, encodings, connection, cursor, replicationMessage, lobject, Xid
 from psycopg2._psycopg import string_types, binary_types, new_type, new_array_type, register_type
 from psycopg2._psycopg import ISQLQuote, Notify, Diagnostics, Column
 
diff --git a/lib/extras.py b/lib/extras.py
index 7de48d78..2f32bf12 100644
--- a/lib/extras.py
+++ b/lib/extras.py
@@ -39,6 +39,7 @@ import psycopg2
 from psycopg2 import extensions as _ext
 from psycopg2.extensions import cursor as _cursor
 from psycopg2.extensions import connection as _connection
+from psycopg2.extensions import replicationMessage as ReplicationMessage
 from psycopg2.extensions import adapt as _A
 from psycopg2.extensions import b
 
@@ -515,13 +516,13 @@ class ReplicationCursor(_cursor):
         else:
             raise RuntimeError("unrecognized replication slot type")
 
-        return self.execute(command)
+        self.execute(command)
 
     def drop_replication_slot(self, slot_name):
         """Drop streaming replication slot."""
 
         command = "DROP_REPLICATION_SLOT %s" % self.quote_ident(slot_name)
-        return self.execute(command)
+        self.execute(command)
 
     def start_replication(self, o, slot_type, slot_name=None, start_lsn=None,
                           timeline=0, keepalive_interval=10, options=None):
diff --git a/psycopg/psycopgmodule.c b/psycopg/psycopgmodule.c
index 27af2112..d44a4b68 100644
--- a/psycopg/psycopgmodule.c
+++ b/psycopg/psycopgmodule.c
@@ -911,6 +911,7 @@ INIT_MODULE(_psycopg)(void)
     /* put new types in module dictionary */
     PyModule_AddObject(module, "connection", (PyObject*)&connectionType);
     PyModule_AddObject(module, "cursor", (PyObject*)&cursorType);
+    PyModule_AddObject(module, "replicationMessage", (PyObject*)&replicationMessageType);
     PyModule_AddObject(module, "ISQLQuote", (PyObject*)&isqlquoteType);
     PyModule_AddObject(module, "Notify", (PyObject*)&notifyType);
     PyModule_AddObject(module, "Xid", (PyObject*)&xidType);