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-rw-r--r--docs/library/sys.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/library/sys.rst b/docs/library/sys.rst
index eeda578e6..bb92850b8 100644
--- a/docs/library/sys.rst
+++ b/docs/library/sys.rst
@@ -1,6 +1,8 @@
:mod:`sys` -- system specific functions
=======================================
+.. include:: ../templates/unsupported_in_circuitpython.inc
+
.. module:: sys
:synopsis: system specific functions
@@ -98,7 +100,7 @@ Constants
usually an identifier of the OS, e.g. ``"linux"``. For baremetal ports it
is an identifier of the chip on a board, e.g. ``"MicroChip SAMD51"``.
It thus can be used to distinguish one board from another.
- If you need to check whether your program runs on MicroPython (vs other
+ If you need to check whether your program runs on CircuitPython (vs other
Python implementation), use `sys.implementation` instead.
.. data:: stderr