Index: trunk/build.xml
===================================================================
--- trunk/build.xml	(revision 11493)
+++ trunk/build.xml	(revision 11494)
@@ -311,4 +311,5 @@
             <compilerarg value="-XDignore.symbol.file"/>
             <compilerarg value="-Xep:ReferenceEquality:OFF" compiler="com.google.errorprone.ErrorProneAntCompilerAdapter"/>
+            <compilerarg value="-Xep:ImmutableEnumChecker:OFF" compiler="com.google.errorprone.ErrorProneAntCompilerAdapter"/>
             <compilerarg line="-Xmaxwarns 1000"/>
         </javac>