diff --git a/cim_for_mina/cim-core/src/com/farsunset/cim/client/android/CIMConnectorManager.java b/cim_for_mina/cim-core/src/com/farsunset/cim/client/android/CIMConnectorManager.java
index f38d9e9..9f27aac 100644
--- a/cim_for_mina/cim-core/src/com/farsunset/cim/client/android/CIMConnectorManager.java
+++ b/cim_for_mina/cim-core/src/com/farsunset/cim/client/android/CIMConnectorManager.java
@@ -3,6 +3,7 @@ import java.net.InetSocketAddress;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.Future;
 import org.apache.mina.core.future.ConnectFuture;
 import org.apache.mina.core.future.WriteFuture;
 import org.apache.mina.core.service.IoHandlerAdapter;