diff --git a/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/gdb/launching/GdbAttachLaunchDelegate.java b/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/gdb/launching/GdbAttachLaunchDelegate.java
index d01c7f9e40d..9eb6dfc2a39 100644
--- a/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/gdb/launching/GdbAttachLaunchDelegate.java
+++ b/dsf-gdb/org.eclipse.cdt.dsf.gdb/src/org/eclipse/cdt/dsf/gdb/launching/GdbAttachLaunchDelegate.java
@@ -12,6 +12,11 @@ package org.eclipse.cdt.dsf.gdb.launching;
 
 import org.eclipse.cdt.dsf.concurrent.ThreadSafe;
  
+/**
+ * A special launch delegate for the attach debug session, which
+ * supports the launch when the project and/or binary is not specified.
+ * @since 4.0
+ */
 @ThreadSafe
 public class GdbAttachLaunchDelegate extends GdbLaunchDelegate
 {