diff --git a/hassio/api/proxy.py b/hassio/api/proxy.py
index 89336ce53..a6e32e87b 100644
--- a/hassio/api/proxy.py
+++ b/hassio/api/proxy.py
@@ -34,7 +34,7 @@ class APIProxy(CoreSysAttributes):
         try:
             data = None
             headers = {}
-            method = getattr(self._websession_ssl, request.method.lower())
+            method = getattr(self.sys_websession_ssl, request.method.lower())
             params = request.query or None
 
             # read data