diff --git a/php.ini-development b/php.ini-development
index beebabbd24f07..6a0b3b9756dfa 100644
--- a/php.ini-development
+++ b/php.ini-development
@@ -1766,7 +1766,7 @@ mssql.secure_connection = Off
 ; substitute_character used when character cannot be converted
 ; one from another
 ; http://php.net/mbstring.substitute-character
-;mbstring.substitute_character = none
+;mbstring.substitute_character = 63
 
 ; overload(replace) single byte functions by mbstring functions.
 ; mail(), ereg(), etc are overloaded by mb_send_mail(), mb_ereg(),
diff --git a/php.ini-production b/php.ini-production
index 5a95344cb451e..01001d3f13bf7 100644
--- a/php.ini-production
+++ b/php.ini-production
@@ -1766,7 +1766,7 @@ mssql.secure_connection = Off
 ; substitute_character used when character cannot be converted
 ; one from another
 ; http://php.net/mbstring.substitute-character
-;mbstring.substitute_character = none
+;mbstring.substitute_character = 63
 
 ; overload(replace) single byte functions by mbstring functions.
 ; mail(), ereg(), etc are overloaded by mb_send_mail(), mb_ereg(),