diff --git a/update.py b/update.py
index 72b368c..66bdb66 100644
--- a/update.py
+++ b/update.py
@@ -187,6 +187,7 @@
     "/trunk/weka/src/main/java/weka/filters/supervised",
     "/trunk/weka/src/main/java/weka/filters/unsupervised",
     "/trunk/weka/src/main/java/weka/knowledgeflow",
+    "/trunk/weka/src/main/java/weka/gui",
     "/trunk/weka/src/main/scripts",
     "/trunk/weka/src/test",
 ]