diff --git a/reference/image/configure.xml b/reference/image/configure.xml
index 62f3c59cf1..6b3ed11eed 100644
--- a/reference/image/configure.xml
+++ b/reference/image/configure.xml
@@ -65,6 +65,8 @@
        To enable support for webp add
        <option role="configure">--with-vpx-dir=DIR</option>. Available as of PHP
        5.5.
+       As of PHP 7.0.0 <option role="configure">--with-webp-dir=DIR</option> has
+       to be added, i.e. support for libvpx has been removed in favor of libwebp.
       </entry>
      </row>
     </tbody>