diff --git a/reference/image/functions/imagegrabwindow.xml b/reference/image/functions/imagegrabwindow.xml
index 9e749069a0..7a43fc5a7e 100644
--- a/reference/image/functions/imagegrabwindow.xml
+++ b/reference/image/functions/imagegrabwindow.xml
@@ -23,7 +23,7 @@
   <para>
    <variablelist>
     <varlistentry>
-     <term><parameter>window</parameter></term>
+     <term><parameter>window_handle</parameter></term>
      <listitem>
       <para>
        The HWND window ID.