diff --git a/core/src/main/java/hudson/model/Slave.java b/core/src/main/java/hudson/model/Slave.java
index f229b93908deef5e4c80b6096b38dd89033d0504..d6c384716216e212f46dd5edf01e29e8e1033917 100644
--- a/core/src/main/java/hudson/model/Slave.java
+++ b/core/src/main/java/hudson/model/Slave.java
@@ -303,7 +303,7 @@ public final class Slave implements Node, Serializable {
                             setChannel(proc.getInputStream(),proc.getOutputStream(),launchLog,new Listener() {
                                 public void onClosed(Channel channel, IOException cause) {
                                     if(cause!=null)
-                                        cause.printStackTrace(listener.error("%s slave agent was terminated\n"));
+                                        cause.printStackTrace(listener.error("%s slave agent was terminated\n",getTimestamp()));
                                     proc.destroy();
                                 }
                             });