diff --git a/reference/zip/constants.xml b/reference/zip/constants.xml
index 412f9d42f3..587814cda7 100644
--- a/reference/zip/constants.xml
+++ b/reference/zip/constants.xml
@@ -506,6 +506,80 @@
    </listitem>
   </varlistentry>
  </variablelist>
+
+ <variablelist xml:id="ziparchive.constants.opsys">
+  <title>Operating system constants for external attributes</title>
+  <varlistentry xml:id="ziparchive.constants.opsys.default">
+   <term>
+    <constant>ZipArchive::OPSYS_DOS</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_AMIGA</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_OPENVMS</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_UNIX</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_VM_CMS</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_ATARI_ST</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_OS_2</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_MACINTOSH</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_Z_SYSTEM</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_CPM</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_WINDOWS_NTFS</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_MVS</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_VSE</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_ACORN_RISC</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_VFAT</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_ALTERNATE_MVS</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_BEOS</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_TANDEM</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_OS_400</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_OS_X</constant> (<type>integer</type>)
+   </term>
+   <term>
+    <constant>ZipArchive::OPSYS_DEFAULT</constant> (<type>integer</type>)
+   </term>
+   <listitem>
+    <simpara>
+     Since PHP 5.6.0, PECL zip 1.12.4
+    </simpara>
+   </listitem>
+  </varlistentry>
+ </variablelist>
 </appendix>
 
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