diff --git a/pmd/project.xml b/pmd/project.xml
index 693fb0b52c..073fe9e9c2 100644
--- a/pmd/project.xml
+++ b/pmd/project.xml
@@ -18,6 +18,7 @@
 PMD scans Java source code and looks for potential problems:
 <ul>
   <li>Unused local variables</li>
+  <li>Unused private instance variables</li>
   <li>Unnecessary object creation</li>
   <li>Empty catch blocks</li>
   <li>Empty if statements</li>