diff --git a/reference/filesystem/functions/fread.xml b/reference/filesystem/functions/fread.xml
index f6f12a961e..6be61e4ee6 100644
--- a/reference/filesystem/functions/fread.xml
+++ b/reference/filesystem/functions/fread.xml
@@ -194,6 +194,7 @@ fclose($handle);
     <member><function>fpassthru</function></member>
     <member><function>ftell</function></member>
     <member><function>rewind</function></member>
+    <member><function>unpack</function></member>
    </simplelist>
   </para>
  </refsect1>
diff --git a/reference/filesystem/functions/fwrite.xml b/reference/filesystem/functions/fwrite.xml
index c9bf0193f2..b0649eecf5 100644
--- a/reference/filesystem/functions/fwrite.xml
+++ b/reference/filesystem/functions/fwrite.xml
@@ -182,6 +182,7 @@ if (is_writable($filename)) {
     <member><function>fsockopen</function></member>
     <member><function>popen</function></member>
     <member><function>file_get_contents</function></member>
+    <member><function>pack</function></member>
    </simplelist>
   </para>
  </refsect1>