NPE when using SSL

When running version 0.9.2 or 0.9.3 of libthrift to access cassandra, I'm getting a NPE:

Caused by: java.lang.NullPointerException
at org.apache.thrift.transport.TSSLTransportFactory$TSSLTransportParameters.<init>(TSSLTransportFactory.java:312)
at org.apache.thrift.transport.TSSLTransportFactory$TSSLTransportParameters.<init>(TSSLTransportFactory.java:297)
at me.prettyprint.cassandra.connection.security.SSLHelper.getTSSLTransportParameters(SSLHelper.java:36)
at me.prettyprint.cassandra.connection.factory.HThriftClientFactoryImpl.createClient(HThriftClientFactoryImpl.java:28)
at me.prettyprint.cassandra.connection.ConcurrentHClientPool.createClient(ConcurrentHClientPool.java:173)
at me.prettyprint.cassandra.connection.ConcurrentHClientPool.<init>(ConcurrentHClientPool.java:58)
at me.prettyprint.cassandra.connection.RoundRobinBalancingPolicy.createConnection(RoundRobinBalancingPolicy.java:68)
at me.prettyprint.cassandra.connection.HConnectionManager.<init>(HConnectionManager.java:68)
at me.prettyprint.cassandra.service.AbstractCluster.<init>(AbstractCluster.java:67)
at me.prettyprint.cassandra.service.ThriftCluster.<init>(ThriftCluster.java:21)
at me.prettyprint.hector.api.factory.HFactory.createCluster(HFactory.java:197)
at me.prettyprint.hector.api.factory.HFactory.getOrCreateCluster(HFactory.java:144)
at com.contextspace.dao.impl.TransactionManager.afterPropertiesSet(TransactionManager.java:62)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
... 114 more

If I downgrade libthrift to version 0.9.1 then it all happily connects. I was wondering whether this was related to: https://issues.apache.org/jira/browse/THRIFT-2122 but I can't see any reason it should be.