diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 1bf562a03d5..f9370d8e52d 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -50,6 +50,8 @@ except ImportError:
 def get_cid():
     if fcntl is None:
         return None
+    if not hasattr(socket, 'IOCTL_VM_SOCKETS_GET_LOCAL_CID'):
+        return None
     try:
         with open("/dev/vsock", "rb") as f:
             r = fcntl.ioctl(f, socket.IOCTL_VM_SOCKETS_GET_LOCAL_CID, "    ")