diff --git a/reference/intl/versions.xml b/reference/intl/versions.xml
index 0b1ab4336f..beb7feee4e 100644
--- a/reference/intl/versions.xml
+++ b/reference/intl/versions.xml
@@ -134,8 +134,8 @@
  <function name='intl_get_error_message' from='PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.0'/>
  <function name='intl_is_failure' from='PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.0'/>
  <function name='intl_error_name' from='PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.0'/>
- <function name='idn_to_ascii' from='PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.2'/>
- <function name='idn_to_utf8' from='PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.2'/>
+ <function name='idn_to_ascii' from='PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.2, PECL idn &gt;= 0.1'/>
+ <function name='idn_to_utf8' from='PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.2, PECL idn &gt;= 0.1'/>
  <!-- FIXME PHP_6 
  <function name='idn_to_unicode' from='PHP 6'/>
  -->