diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index 690a4f7b0467..409bf3b87455 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,11 @@
+2003-12-02  Michael Koch  <konqueror@gmx.de>
+
+	* java/nio/channels/spi/AbstractInterruptibleChannel.java
+	(opened): Removed.
+	(closed): New field.
+	(close): Check of channel is closed already.
+	(isOpen): Return !closed.
+
 2003-12-02  Michael Koch  <konqueror@gmx.de>
 
 	* gnu/java/nio/DatagramChannelImpl.java
diff --git a/libjava/java/nio/channels/spi/AbstractInterruptibleChannel.java b/libjava/java/nio/channels/spi/AbstractInterruptibleChannel.java
index dd4177a8a012..0cf798eaf572 100644
--- a/libjava/java/nio/channels/spi/AbstractInterruptibleChannel.java
+++ b/libjava/java/nio/channels/spi/AbstractInterruptibleChannel.java
@@ -49,7 +49,7 @@ import java.nio.channels.InterruptibleChannel;
 public abstract class AbstractInterruptibleChannel
   implements Channel, InterruptibleChannel
 {
-  boolean opened = true;
+  private boolean closed;
 
   /**
    * Initializes the channel.
@@ -72,8 +72,11 @@ public abstract class AbstractInterruptibleChannel
    */
   public final void close () throws IOException
   {
-    opened = false;
-    implCloseChannel ();
+    if (!closed)
+      {
+	implCloseChannel();
+	closed = true;
+      }
   }
 
   /**
@@ -101,6 +104,6 @@ public abstract class AbstractInterruptibleChannel
    */
   public final boolean isOpen ()
   {
-    return opened;
+    return !closed;
   }
 }