diff --git a/functions/image.xml b/functions/image.xml
index b451195470..fa66c5eb57 100644
--- a/functions/image.xml
+++ b/functions/image.xml
@@ -2031,6 +2031,38 @@ ImageDestroy ($im);
    </refsect1>
   </refentry>
 
+  <refentry id="function.imagetypes">
+   <refnamediv>
+    <refname>ImageTypes</refname>
+    <refpurpose>
+	  Return the image types supported by this PHP build
+    </refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+    <funcsynopsis>
+     <funcprototype>
+      <funcdef>int <function>imagettypes</function></funcdef>
+     </funcprototype>
+    </funcsynopsis>
+    <para>
+	 This function returns a bit-field corresponding to the image formats
+	 supported by the version of GD linked into PHP.  The following bits
+	 are returned, IMG_GIF | IMG_JPG | IMG_PNG | IMG_WBMP.  To check for PNG
+	 support, for example, do this:
+     <example>
+      <title>ImageTypes</title>
+      <programlisting role="php">
+&lt;?php
+if(ImageTypes() &amp; IMG_PNG) {
+	echo "PNG Support is enabled";
+}
+?&gt;
+      </programlisting>
+     </example>
+	</para>
+   </refsect1>
+  </refentry>
  </reference>
 
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