diff --git a/pmd/xdocs/credits.xml b/pmd/xdocs/credits.xml
index e164a95c8c..5391eaef1d 100644
--- a/pmd/xdocs/credits.xml
+++ b/pmd/xdocs/credits.xml
@@ -57,6 +57,7 @@
         </subsection>
         <subsection name="Contributors">
         <ul>
+            <li>Sergey Pariev - Fixed an ugly ArrayIndexOutOfBoundsException in CPD for Ruby</li>
             <li>Chris Heister - Reported and noted proper fix for bug in IDEAJ renderer operations</li>
             <li>Ralf Wagner - Reported bug in UselessOperationOnImmutable, reported and noted proper fix for broken XSLT</li>
             <li>Caroline Rioux - Reported bug in ImmutableField</li>