diff --git a/momoko/connection.py b/momoko/connection.py
index 1496454..cda92fc 100644
--- a/momoko/connection.py
+++ b/momoko/connection.py
@@ -556,7 +556,7 @@ def on_ping_done(ping_fut):
                 try:
                     ping_fut.result()
                 except psycopg2.Error as error:
-                    ping_future.set_exc_info(error)
+                    ping_future.set_exception(error)
                     self.putconn(conn)
                 else:
                     ping_future.set_result(conn)