diff --git a/src/connector/python/taos/cinterface.py b/src/connector/python/taos/cinterface.py
index 660707bfcd04edb9d815b38d8ae806f35d2bfe2b..d9db1272ef2802463a891d3c626b66111f805975 100644
--- a/src/connector/python/taos/cinterface.py
+++ b/src/connector/python/taos/cinterface.py
@@ -268,7 +268,7 @@ def _load_taos():
     try:
         return load_func[platform.system()]()
     except:
-        sys.exit('unsupported platform to TDengine connector')
+        raise InterfaceError('unsupported platform or failed to load taos client library')
 
 
 class CTaosInterface(object):