diff --git a/src/main/java/org/primefaces/component/treetable/TreeTableRenderer.java b/src/main/java/org/primefaces/component/treetable/TreeTableRenderer.java
index <HASH>..<HASH> 100644
--- a/src/main/java/org/primefaces/component/treetable/TreeTableRenderer.java
+++ b/src/main/java/org/primefaces/component/treetable/TreeTableRenderer.java
@@ -264,7 +264,7 @@ public class TreeTableRenderer extends DataRenderer {
         boolean hasPaginator = tt.isPaginator();
 
         if (!(root instanceof TreeNode)) {
-            throw new FacesException("treeTable's value must be an instance of org.primefaces.model.TreeNode");
+            throw new FacesException("treeTable's value must be an instance of " + TreeNode.class.getName());
         }
 
         if (hasPaginator) {
Fix #<I> - dynamically get the full-qualified name of TreeNode