diff --git a/include/mimalloc/atomic.h b/include/mimalloc/atomic.h
index c66f8049..971b374a 100644
--- a/include/mimalloc/atomic.h
+++ b/include/mimalloc/atomic.h
@@ -1,5 +1,5 @@
 /* ----------------------------------------------------------------------------
-Copyright (c) 2018-2021 Microsoft Research, Daan Leijen
+Copyright (c) 2018-2023 Microsoft Research, Daan Leijen
 This is free software; you can redistribute it and/or modify it under the
 terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
diff --git a/include/mimalloc/internal.h b/include/mimalloc/internal.h
index 9c2f4334..8c9e98a1 100644
--- a/include/mimalloc/internal.h
+++ b/include/mimalloc/internal.h
@@ -1,5 +1,5 @@
 /* ----------------------------------------------------------------------------
-Copyright (c) 2018-2022, Microsoft Research, Daan Leijen
+Copyright (c) 2018-2023, Microsoft Research, Daan Leijen
 This is free software; you can redistribute it and/or modify it under the
 terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
diff --git a/include/mimalloc/types.h b/include/mimalloc/types.h
index f2bd649d..c7ddaaae 100644
--- a/include/mimalloc/types.h
+++ b/include/mimalloc/types.h
@@ -1,5 +1,5 @@
 /* ----------------------------------------------------------------------------
-Copyright (c) 2018-2021, Microsoft Research, Daan Leijen
+Copyright (c) 2018-2023, Microsoft Research, Daan Leijen
 This is free software; you can redistribute it and/or modify it under the
 terms of the MIT license. A copy of the license can be found in the file
 "LICENSE" at the root of this distribution.
diff --git a/src/prim/readme.md b/src/prim/readme.md
index eb02f274..380dd3a7 100644
--- a/src/prim/readme.md
+++ b/src/prim/readme.md
@@ -2,7 +2,8 @@
 
 This is the portability layer where all primitives needed from the OS are defined.
 
-- `prim.h`: API definition
-- `prim.c`: Selects one of `unix/prim.c`, `wasi/prim.c`, or `windows/prim.c` depending on the host platform.
+- `include/mimalloc/prim.h`: primitive portability API definition.
+- `prim.c`: Selects one of `unix/prim.c`, `wasi/prim.c`, or `windows/prim.c` depending on the host platform
+            (and on macOS, `osx/prim.c` defers to `unix/prim.c`).
 
 Note: still work in progress, there may still be places in the sources that still depend on OS ifdef's.
\ No newline at end of file