diff --git a/influxdb/client.py b/influxdb/client.py
index e38d4b78..f5c0b55b 100644
--- a/influxdb/client.py
+++ b/influxdb/client.py
@@ -103,7 +103,7 @@ def __init__(self,
         if ssl is True:
             self._scheme = "https"
 
-        self._session.mount(self._scheme, adapter)
+        self._session.mount(self._scheme + '://', adapter)
 
         if proxies is None:
             self._proxies = {}