diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index d9cf954..8a02b76 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -450,7 +450,7 @@
 .. envvar:: PYTHONCASEOK
 
    If this is set, Python ignores case in :keyword:`import` statements.  This
-   only works on Windows.
+   only works on Windows and OS X.
 
 
 .. envvar:: PYTHONDONTWRITEBYTECODE
diff --git a/Misc/NEWS b/Misc/NEWS
index 320e386..8285f35 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -2124,6 +2124,8 @@
 Documentation
 -------------
 
+- Issue #13883: PYTHONCASEOK also works on OS X.
+
 - Issue #12949: Document the kwonlyargcount argument for the PyCode_New
   C API function.