diff --git a/pymodbus/client/base.py b/pymodbus/client/base.py
index deb4d5c10..0d47a1e50 100644
--- a/pymodbus/client/base.py
+++ b/pymodbus/client/base.py
@@ -119,7 +119,7 @@ def __init__(  # pylint: disable=too-many-arguments
         self.state = ModbusTransactionState.IDLE
         self.last_frame_end: float = 0
         self.silent_interval: float = 0
-        self._reconnect_task = None
+        self._reconnect_task: asyncio.Task = None
 
         # Initialize  mixin
         ModbusClientMixin.__init__(self)