diff --git a/doc/releases/release-notes-3.4.rst b/doc/releases/release-notes-3.4.rst
index e412fbab58dd85..86dd7149a14e49 100644
--- a/doc/releases/release-notes-3.4.rst
+++ b/doc/releases/release-notes-3.4.rst
@@ -202,6 +202,9 @@ Deprecated in this release
   functionality, enable
   :kconfig:option:`CONFIG_NRF_STORE_REBOOT_TYPE_GPREGRET`.
 
+* Deprecated :c:macro:`PTHREAD_BARRIER_DEFINE` in favor of the standardized
+  :c:func:`pthread_barrier_init`
+
 Stable API changes in this release
 ==================================