diff --git a/reference/phar/constants.xml b/reference/phar/constants.xml
index 0da496e236..3e16f4aadd 100644
--- a/reference/phar/constants.xml
+++ b/reference/phar/constants.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- $Revision: 1.5 $ -->
+<!-- $Revision: 1.6 $ -->
 
 <appendix xml:id="phar.constants" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  &reftitle.constants;
  &extension.constants;
-  <table>
+  <table xml:id="phar.constants.compression">
    <title>Phar compression constants</title>
    <tgroup cols="3">
     <thead>
@@ -50,7 +50,7 @@
     </tbody>
    </tgroup>
   </table>
-  <table>
+  <table xml:id="phar.constants.fileformat">
    <title>Phar file format constants</title>
    <tgroup cols="3">
     <thead>
@@ -96,7 +96,7 @@
     </tbody>
    </tgroup>
   </table>
-  <table>
+  <table xml:id="phar.constants.signature">
    <title>Phar signature constants</title>
    <tgroup cols="3">
     <thead>
@@ -151,7 +151,7 @@
     </tbody>
    </tgroup>
   </table>
-  <table>
+  <table xml:id="phar.constants.mimeoverride">
    <title>Phar webPhar mime override constants</title>
    <tgroup cols="3">
     <thead>