diff --git a/reference/mysqli/constants.xml b/reference/mysqli/constants.xml
index b7a736cf5f..2b98a07b1e 100644
--- a/reference/mysqli/constants.xml
+++ b/reference/mysqli/constants.xml
@@ -509,6 +509,15 @@
      </para>
     </listitem>
    </varlistentry>
+   <varlistentry xml:id="constantmysqli-type-json">
+    <term><constant>MYSQLI_TYPE_JSON</constant></term>
+    <listitem>
+     <para>
+      Field is defined as <literal>JSON</literal>.
+      Only valid for mysqlnd and MySQL 5.7.8 and up.
+     </para>
+    </listitem>
+   </varlistentry>
    <varlistentry xml:id="constantmysqli-need-data">
     <term><constant>MYSQLI_NEED_DATA</constant></term>
     <listitem>