diff --git a/hints/aix.sh b/hints/aix.sh
index 6b4d2fa49280..b753504cb854 100644
--- a/hints/aix.sh
+++ b/hints/aix.sh
@@ -704,4 +704,7 @@ case "$osvers" in
     ;;
 esac
 
+# GH #23825
+ccflags="$ccflags -DNO_POSIX_2008_LOCALE"
+
 # EOF
diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 147ab795c621..e57d0ccf647b 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -330,9 +330,10 @@ L</Modules and Pragmata> section.
 
 =over 4
 
-=item XXX-some-platform
+=item AIX
 
-XXX
+Thread-safe locale handling has been turned off on all releases due to
+apparent bugs in the underlying operating system support.
 
 =back