diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index d9cf954ce19..8a02b764eac 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -450,7 +450,7 @@ These environment variables influence Python's behavior.
 .. 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 2dab0a1c368..a970dc5c12c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -2117,6 +2117,8 @@ C-API
 Documentation
 -------------
 
+- Issue #13883: PYTHONCASEOK also works on OS X.
+
 - Issue #12949: Document the kwonlyargcount argument for the PyCode_New
   C API function.