JDBC compilation failes

Hi,

I'm having difficulties compiling the JDBC interface from the latest
6.3 snapshot. I'm using FreeBSD-2.2.5 with the JDK 1.1.5 port from
ftp://hub.freebsd.org/pub/incoming/java/jdk1.1.5.tar.gz

When compiling CallableStatement.java the compiler gets this error:
javac postgresql/CallableStatement.java
postgresql/CallableStatement.java:37: Can't subclass interfaces: interface java.sql.PreparedStatement
public class CallableStatement extends PreparedStatement implements java.sql.CallableStatement
                                       ^

Is it my JDK port or the JDBC interface?
TIA --Jeroen