diff --git a/can/interfaces/slcan.py b/can/interfaces/slcan.py
index a952fb7c4..89ba00621 100644
--- a/can/interfaces/slcan.py
+++ b/can/interfaces/slcan.py
@@ -7,13 +7,14 @@
 
 """
 
+import io
 from typing import Any, Optional, Tuple
-from can import typechecking
 
 import time
 import logging
 
 from can import BusABC, Message
+from can import typechecking
 
 logger = logging.getLogger(__name__)
 
@@ -252,9 +253,12 @@ def shutdown(self) -> None:
         self.serialPortOrig.close()
 
     def fileno(self) -> int:
-        if hasattr(self.serialPortOrig, "fileno"):
+        try:  
             return self.serialPortOrig.fileno()
-        # Return an invalid file descriptor on Windows
+        except (io.UnsupportedOperation):
+            # Return an invalid file descriptor on a platform which doesn't implement fileno such as Windows
+            pass
+
         return -1
 
     def get_version(