diff --git a/api/core/virtual_environment/channel/pipe_transport.py b/api/core/virtual_environment/channel/pipe_transport.py
index 85ae7fde46..12a3c8dadd 100644
--- a/api/core/virtual_environment/channel/pipe_transport.py
+++ b/api/core/virtual_environment/channel/pipe_transport.py
@@ -9,6 +9,8 @@ class PipeTransport(Transport):
     one for reading and one for writing.
 
     NOTE: r_fd and w_fd must be a pair created by os.pipe(). or returned from subprocess.Popen
+
+    NEVER FORGET TO CALL `close()` METHOD TO AVOID FILE DESCRIPTOR LEAKAGE.
     """
 
     def __init__(self, r_fd: int, w_fd: int):