diff --git a/compiler/cpp/src/generate/t_java_generator.cc b/compiler/cpp/src/generate/t_java_generator.cc
index cd4b873..37c0c59 100644
--- a/compiler/cpp/src/generate/t_java_generator.cc
+++ b/compiler/cpp/src/generate/t_java_generator.cc
@@ -383,7 +383,7 @@
     out <<
       endl <<
       indent() << "public final Isset __isset = new Isset();" << endl <<
-      indent() << "public static final class Isset {" << endl;
+      indent() << "public static final class Isset implements java.io.Serializable {" << endl;
     indent_up();
       for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
         indent(out) <<