vala missing header

bar.h

#ifndef __BAR_H__
#define __BAR_H__

enum {
    BAR_UP
};

#endif

foo.h

#ifndef __FOO_H__
#define __FOO_H__

enum {
    FOO_UP
};

#endif

foo.vala

// valac -C foo.vala --vapidir . --pkg foo

public static void main() {

	var f = Test.Foo.UP;
	var b = Test.Bar.UP;
}

foo.vapi

namespace Test {

	[CCode (cheader_filename = "foo.h", cname = "int", cprefix = "FOO_")]
	public enum Foo {
		UP
	}

	[CCode (cheader_filename = "bar.h", cname = "int", cprefix = "BAR_")]
	public enum Bar {
		UP
	}
}

generated-foo.c

/* foo.c generated by valac 0.30.1, the Vala compiler
 * generated from foo.vala, do not modify */


#include <glib.h>
#include <glib-object.h>
#include <foo.h>




void _vala_main (void);


void _vala_main (void) {
	int f = 0;
	int b = 0;
	f = FOO_UP;
	b = BAR_UP;
}


int main (int argc, char ** argv) {
#if !GLIB_CHECK_VERSION (2,35,0)
	g_type_init ();
#endif
	_vala_main ();
	return 0;
}

include <bar.h> is missing from generated-foo.c