diff --git a/hints/aix.sh b/hints/aix.sh
index 6b4d2fa49280..c3b8e06463cd 100644
--- a/hints/aix.sh
+++ b/hints/aix.sh
@@ -704,4 +704,7 @@ case "$osvers" in
     ;;
 esac
 
+# GH #23825
+d_duplocale='undef'
+
 # EOF
diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 78c0da7e57f7..57c8746e8c44 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