diff --git a/ant/org.eclipse.ant.tests.ui/forceQualifierUpdate.txt b/ant/org.eclipse.ant.tests.ui/forceQualifierUpdate.txt
index 56f1032..a7d33c9 100644
--- a/ant/org.eclipse.ant.tests.ui/forceQualifierUpdate.txt
+++ b/ant/org.eclipse.ant.tests.ui/forceQualifierUpdate.txt
@@ -1,2 +1,3 @@
 # To force a version qualifier update add the bug here
 Bug 403352 - Update all parent versions to match our build stream
+Bug 509973 - Comparator errors in I20170105-0320