diff --git a/localedata/ChangeLog b/localedata/ChangeLog
index 1183ce87cf..1762cf12c0 100644
--- a/localedata/ChangeLog
+++ b/localedata/ChangeLog
@@ -1,3 +1,7 @@
+2016-03-16  Carlos O'Donell  <carlos@redhat.com>
+
+	* locales/an_ES (lang_ab): Use lowercase.
+
 2016-03-05  Mike Frysinger  <vapier@gentoo.org>
 
 	* locales/af_ZA (LC_IDENTIFICATION): Set tel & fax to "".
diff --git a/localedata/locales/an_ES b/localedata/locales/an_ES
index e6d00f3519..202732dc64 100644
--- a/localedata/locales/an_ES
+++ b/localedata/locales/an_ES
@@ -134,7 +134,7 @@ postal_fmt    "<U0025><U0066><U0025><U004E><U0025><U0061><U0025><U004E>/
 country_ab2   "<U0045><U0053>"
 country_ab3   "<U0045><U0053><U0050>"
 country_num   724
-lang_ab       "<U0041><U004E>"
+lang_ab       "<U0061><U006E>"
 % E
 country_car    "<U0045>"
 % aragonés