diff --git a/NEWS b/NEWS
index ac12a8098b71b..a0fd313f86a69 100644
--- a/NEWS
+++ b/NEWS
@@ -213,7 +213,7 @@ PHP                                                                        NEWS
 
 - Intl:
   . Added grapheme_strpos(), grapheme_stripos(), grapheme_strrpos(),
-    grapheme_strripos(), grapheme_strstr(), grapheme_stristr() and
+    grapheme_strripos(), grapheme_substr(), grapheme_strstr(), grapheme_stristr() and
     grapheme_levenshtein() functions add $locale parameter (Yuya Hamada).
   . Fixed bug GH-11952 (Fix locale strings canonicalization for IntlDateFormatter
     and NumberFormatter). (alexandre-daubois)
diff --git a/UPGRADING b/UPGRADING
index e58d2875832fd..b60c9b49d7180 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -613,8 +613,8 @@ PHP 8.5 UPGRADE NOTES
     have dropped the false from the return type union. Returning false
     was actually never possible.
   . grapheme_strpos(), grapheme_stripos(), grapheme_strrpos(),
-    grapheme_strripos(), grapheme_strstr(), grapheme_stristr() and
-    grapheme_levenshtein() functions add $locale parameter.
+    grapheme_strripos(), grapheme_substr(), grapheme_strstr()
+    and grapheme_stristr() functions add $locale parameter.
     RFC: https://wiki.php.net/rfc/grapheme_add_locale_for_case_insensitive
 
 - LDAP: