diff --git a/man7/locale.7 b/man7/locale.7
index cb766269a..6f558fff7 100644
--- a/man7/locale.7
+++ b/man7/locale.7
@@ -100,6 +100,21 @@ and the multibyte character functions such as
 or
 .BR wctomb (3).
 .TP
+.BR LC_IDENTIFICATION " (GNU extension, since glibc 2.2)"
+Change settings that relate to the metdata for the locale.
+Applications that need this information can use
+.BR nl_langinfo (3)
+to retrieve nonstandard elements, such as
+.B _NL_IDENTIFICATION_TITLE
+(title of this locale document)
+and
+.B _NL_IDENTIFICATION_TERRITORY
+(geograpical territory to which this locale document applies),
+which might return strings such as "English locale for the USA"
+and "USA".
+(Other element names are listed in
+.IR <langinfo.h> .)
+.TP
 .B LC_MONETARY
 This changes the information returned by
 .BR localeconv (3)