diff --git a/templates/etc-php5-apache2-php.ini b/templates/etc-php5-apache2-php.ini
index 8157841b7f4dbe76f1507d8844f81af8948832ef..1474a80dc1288358b4ac71fa4838b0a756ed074d 100644
--- a/templates/etc-php5-apache2-php.ini
+++ b/templates/etc-php5-apache2-php.ini
@@ -1738,11 +1738,17 @@ zend.assertions = {{ php_zend_assertions }}
 ; http input encoding.
 ; http://php.net/mbstring.http-input
 ;mbstring.http_input = UTF-8
+{% if php_mbstring_http_input is defined %}
+mbstring.http_input = {{ php_mbstring_http_input }}
+{% endif %}
 
 ; http output encoding. mb_output_handler must be
 ; registered as output buffer to function
 ; http://php.net/mbstring.http-output
 ;mbstring.http_output = pass
+{% if php_mbstring_http_output is defined %}
+mbstring.http_output = {{ php_mbstring_http_output }}
+{% endif %}
 
 ; enable automatic encoding translation according to
 ; mbstring.internal_encoding setting. Input chars are