diff --git a/reference/phpdbg/constants.xml b/reference/phpdbg/constants.xml
index dab4d9d70e..eb533551d6 100644
--- a/reference/phpdbg/constants.xml
+++ b/reference/phpdbg/constants.xml
@@ -23,6 +23,7 @@
     </term>
     <listitem>
      <simpara>
+      Removed as of PHP 7.3.0.
      </simpara>
     </listitem>
    </varlistentry>
@@ -33,6 +34,7 @@
     </term>
     <listitem>
      <simpara>
+      Removed as of PHP 7.3.0.
      </simpara>
     </listitem>
    </varlistentry>
@@ -43,6 +45,7 @@
     </term>
     <listitem>
      <simpara>
+      Removed as of PHP 7.3.0.
      </simpara>
     </listitem>
    </varlistentry>
@@ -53,6 +56,7 @@
     </term>
     <listitem>
      <simpara>
+      Removed as of PHP 7.3.0.
      </simpara>
     </listitem>
    </varlistentry>