diff --git a/aiohomekit/controller/ip/connection.py b/aiohomekit/controller/ip/connection.py
index ca0cafe0..5378167d 100644
--- a/aiohomekit/controller/ip/connection.py
+++ b/aiohomekit/controller/ip/connection.py
@@ -159,7 +159,8 @@ def _cancel_pending_requests(self) -> None:
         # fire, so set them to an error state.
         while self.result_cbs:
             result = self.result_cbs.pop(0)
-            result.set_exception(AccessoryDisconnectedError("Connection closed"))
+            if not result.done():
+                result.set_exception(AccessoryDisconnectedError("Connection closed"))
 
 
 class SecureHomeKitProtocol(InsecureHomeKitProtocol):