diff --git a/build.xml b/build.xml
index 639b1ea4924..9ce95864f2d 100644
--- a/build.xml
+++ b/build.xml
@@ -305,6 +305,7 @@
 
                     -dontwarn org.jetbrains.jet.internal.com.intellij.util.**
                     -dontwarn org.jetbrains.jet.internal.com.intellij.codeInsight.**
+                    -dontwarn org.jetbrains.jet.internal.com.thoughtworks.xstream.**
 
                     -libraryjars '${rtjar}'