diff --git a/reference/filter/constants.xml b/reference/filter/constants.xml
index 82beb19e09..dda69e43ad 100644
--- a/reference/filter/constants.xml
+++ b/reference/filter/constants.xml
@@ -572,7 +572,7 @@
    <listitem>
     <simpara>
      Require scheme in "validate_url" filter.
-     (Deprecated per PHP 7.3 as it is implied in the filter already.)
+     (Deprecated as of PHP 7.3.0 and removed as of PHP 8.0.0, as it is implied in the filter already.)
     </simpara>
    </listitem>
   </varlistentry>
@@ -584,7 +584,7 @@
    <listitem>
     <simpara>
      Require host in "validate_url" filter.
-     (Deprecated per PHP 7.3 as it is implied in the filter already.)
+     (Deprecated as of PHP 7.3.0 and removed as of PHP 8.0.0, as it is implied in the filter already.)
     </simpara>
    </listitem>
   </varlistentry>