diff --git a/reference/mysqli/constants.xml b/reference/mysqli/constants.xml
index d375b7b4da..0d10b35d99 100644
--- a/reference/mysqli/constants.xml
+++ b/reference/mysqli/constants.xml
@@ -500,6 +500,14 @@
      </para>
     </listitem>
    </varlistentry>
+   <varlistentry xml:id="constantmysqli-binary-flag">
+    <term><constant>MYSQLI_BINARY_FLAG</constant></term>
+    <listitem>
+     <para>
+      Field is defined as <literal>BINARY</literal>. Available since PHP 5.3.0.
+     </para>
+    </listitem>
+   </varlistentry>
    <varlistentry xml:id="constantmysqli-cursor-type-for-update">
     <term><constant>MYSQLI_CURSOR_TYPE_FOR_UPDATE</constant></term>
     <listitem>