diff --git a/doc/api/child_process.md b/doc/api/child_process.md
index a3bdfc15c385e7..b2208c006ccaeb 100644
--- a/doc/api/child_process.md
+++ b/doc/api/child_process.md
@@ -637,7 +637,8 @@ pipes between the parent and child. The value is one of the following:
    occurred).
 6. Positive integer - The integer value is interpreted as a file descriptor
    that is currently open in the parent process. It is shared with the child
-   process, similar to how {Stream} objects can be shared.
+   process, similar to how {Stream} objects can be shared. Passing sockets
+   is not supported on Windows.
 7. `null`, `undefined` - Use default value. For stdio fds 0, 1, and 2 (in other
    words, stdin, stdout, and stderr) a pipe is created. For fd 3 and up, the
    default is `'ignore'`.