diff --git a/pmd-eclipse-plugin/plugins/net.sourceforge.pmd.eclipse.plugin/schema/rulesets.exsd b/pmd-eclipse-plugin/plugins/net.sourceforge.pmd.eclipse.plugin/schema/rulesets.exsd
index 50f28a3006..0d2111521c 100644
--- a/pmd-eclipse-plugin/plugins/net.sourceforge.pmd.eclipse.plugin/schema/rulesets.exsd
+++ b/pmd-eclipse-plugin/plugins/net.sourceforge.pmd.eclipse.plugin/schema/rulesets.exsd
@@ -47,7 +47,7 @@
          <attribute name="class" type="string" use="required">
             <annotation>
                <documentation>
-                  The absolute implementation class of a RuleSet Manager. Must be an implementation of net.sourceforge.pmd.IRuleSetsExtension interface.
+                  The absolute implementation class of a RuleSet Manager. Must be an implementation of net.sourceforge.pmd.eclipse.core.IRuleSetsExtension interface.
                </documentation>
                <appInfo>
                   <meta.attribute kind="java" basedOn="net.sourceforge.pmd.eclipse.core.IRuleSetsExtension"/>