diff --git a/basethon/base_thon.py b/basethon/base_thon.py
index 768353f..bdfb763 100644
--- a/basethon/base_thon.py
+++ b/basethon/base_thon.py
@@ -176,6 +176,7 @@ class BaseThon(BaseData):
     async def __aenter__(self) -> str | Self:
         r = await self.check()
         if r != "OK":
+            await self.disconnect()
             return r
         return self