Cross compilation of Groovy annotation on Java class does not work

This annotation:

@Retention(RetentionPolicy.RUNTIME)
@Target([ElementType.TYPE, ElementType.METHOD])
@interface Tx {

    String value() default 'def'
}

on this class:

@Tx
public class PersonServiceJava {
}

results in the following failure:

$ groovyc -j PersonServiceJava.java Tx.groovy
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Compile error during compilation with javac.
/home/wujek/Playground/annotation_test/src/main/groovy/test/PersonServiceJava.java:4: error: annotation Tx is missing value for the attribute value
@Tx
^
1 error

I originally submitted it to Gradle (http://issues.gradle.org/browse/GRADLE-2682), but it seems to be a core groovy issue. The generated stub for the Groovy annotation look like the following:

@java.lang.annotation.Retention(value=java.lang.annotation.RetentionPolicy.RUNTIME) @java.lang.annotation.Target(value={java.lang.annotation.ElementType.TYPE,java.lang.annotation.ElementType.METHOD}) public @interface Tx
 {
 java.lang.String value();
}

The default value is missing. A sample project can be downloaded in the Gradle issue, so I won't attach it here, unless you want me to.