diff --git a/reference/intl/constants.xml b/reference/intl/constants.xml
index 2791e383f2..d89eb4bd87 100644
--- a/reference/intl/constants.xml
+++ b/reference/intl/constants.xml
@@ -110,6 +110,7 @@
      <simpara>
       Use IDNA 2003 algorithm in <function>idn_to_utf8</function> and
       <function>idn_to_ascii</function>. This is the default.
+      This constant and using the default has been deprecated as of PHP 7.2.0.
      </simpara>
     </listitem>
    </varlistentry>
diff --git a/reference/intl/idn/idn-to-ascii.xml b/reference/intl/idn/idn-to-ascii.xml
index 91ed2af985..0b1b0332ee 100644
--- a/reference/intl/idn/idn-to-ascii.xml
+++ b/reference/intl/idn/idn-to-ascii.xml
@@ -90,6 +90,13 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>7.2.0</entry>
+       <entry>
+        <constant>INTL_IDNA_VARIANT_2003</constant> has been deprecated; use
+        <constant>INTL_IDNA_VARIANT_UTS46</constant> instead.
+       </entry>
+      </row>
       <row>
        <entry>5.4.0/PECL 2.0.0b1</entry>
        <entry>
diff --git a/reference/intl/idn/idn-to-utf8.xml b/reference/intl/idn/idn-to-utf8.xml
index f2637314cd..1717271d4d 100644
--- a/reference/intl/idn/idn-to-utf8.xml
+++ b/reference/intl/idn/idn-to-utf8.xml
@@ -90,6 +90,13 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>7.2.0</entry>
+       <entry>
+        <constant>INTL_IDNA_VARIANT_2003</constant> has been deprecated; use
+        <constant>INTL_IDNA_VARIANT_UTS46</constant> instead.
+       </entry>
+      </row>
       <row>
        <entry>5.4.0/PECL 2.0.0b1</entry>
        <entry>