diff --git a/www/api/module.html b/www/api/module.html
index 6d72349..5d2f4c3 100644
--- a/www/api/module.html
+++ b/www/api/module.html
@@ -243,8 +243,8 @@
 <p>The format of the GetModuleList function is:</p>
 
 <pre class="text">
-  char **GetModuleList(const char *pattern,size_t *number_modules,
-    ExceptionInfo *exception)
+  char **GetModuleList(const char *pattern,const MagickModuleType type,
+    size_t *number_modules,ExceptionInfo *exception)
 </pre>
 
 <p>A description of each parameter follows:</p></ol>
@@ -252,6 +252,9 @@
 <h5>pattern</h5>
 <ol><p>Specifies a pointer to a text string containing a pattern.</p></ol>
 
+<h5>type</h5>
+<ol><p>choose from MagickImageCoderModule or MagickImageFilterModule.</p></ol>
+
 <h5>number_modules</h5>
 <ol><p>This integer returns the number of modules in the list.</p></ol>