diff --git a/functions/zlib.xml b/functions/zlib.xml
index 8c3c1d19a1..d7ce4c9a16 100644
--- a/functions/zlib.xml
+++ b/functions/zlib.xml
@@ -515,6 +515,56 @@ gzclose( $zd );
    </refsect1>
   </refentry>
 
+  <refentry id="function.gzcompress">
+   <refnamediv>
+    <refname>gzcompress</refname>
+    <refpurpose>gz-compress a string</refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+    <funcsynopsis>
+     <funcdef>string <function>gzcompress</function></funcdef>
+     <paramdef>string <parameter>data</parameter></paramdef>
+     <paramdef>int <parameter><optional>level</optional></parameter></paramdef>
+    </funcsynopsis>
+    <para>		
+		 This function returns a gzip-compressed version of the input 
+     <parameter>data</parameter> or false on errors. The optional parameter 
+     <parameter>level</parameter> can be given as 0 for no compression 
+     up to 9 for maximum compression.     	
+		</para>
+    <para>
+     See also <function>gzuncompress</function>.
+    </para>
+   </refsect1>
+  </refentry>
+
+  <refentry id="function.gzuncompress">
+   <refnamediv>
+    <refname>gzuncompress</refname>
+    <refpurpose>uncompress a gz-compressed string</refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+    <funcsynopsis>
+     <funcdef>string <function>gzcompress</function></funcdef>
+     <paramdef>string <parameter>data</parameter></paramdef>
+     <paramdef>int <parameter><optional>length</optional></parameter></paramdef>
+    </funcsynopsis>
+    <para>			
+     This function takes <parameter>data</parameter> compressed by 
+     <function>gzcompress</function> and returns the orignial uncompressed
+     data or false on error. 
+     The function will return an error if the uncompressed data is more then 256 
+     times the lenght of the compressed input <parameter>data</parameter> or more 
+     than the optional parameter <parameter>length</parameter>.
+		</para>
+    <para>
+     See also <function>gzcompress</function>.
+    </para>
+   </refsect1>
+  </refentry>
+
  </reference>
 
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