diff --git a/linkcheck/xdocs/properties.xml b/linkcheck/xdocs/properties.xml
index 867c37ab..a8a89c98 100644
--- a/linkcheck/xdocs/properties.xml
+++ b/linkcheck/xdocs/properties.xml
@@ -40,8 +40,10 @@
           <td>maven.linkcheck.cache</td>
           <td>Yes</td>
           <td>
-            <p>Default value is
-              <code>${maven.build.dir}/linkcheck/linkcheck.cache</code>.</p>
+            <p>Determines where the cache for the linkchecking is stored.  Default value is
+              <code>${maven.build.dir}/linkcheck/linkcheck.cache</code>. This means that
+			  a clean build deletes the cache.  If you have an extremely large document tree this
+		      can have a negative effect on performance.</p>
           </td>
         </tr>