diff --git a/COPYING b/COPYING
index ad17c7c6e..22c9341b8 100644
--- a/COPYING
+++ b/COPYING
@@ -22,8 +22,10 @@ Public License, version 2.
 Files under the xenserver directory are licensed on a file-by-file
 basis.  Refer to each file for details.
 
-Files lib/sflow*.[ch] are licensed under the terms of the InMon sFlow
-licence that is available at:
+Files lib/sflow*.[ch] are licensed under the terms of either the
+Sun Industry Standards Source License 1.1, that is available at:
+        http://host-sflow.sourceforge.net/sissl.html
+or the InMon sFlow License, that is available at:
         http://www.inmon.com/technology/sflowlicense.txt
 
 Files under python/compat are licensed under the Python Software
diff --git a/lib/sflow.h b/lib/sflow.h
index e3c5f4961..8ea96937f 100644
--- a/lib/sflow.h
+++ b/lib/sflow.h
@@ -1,5 +1,9 @@
-/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of the InMon sFlow licence: */
-/* http://www.inmon.com/technology/sflowlicense.txt */
+/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the
+ *   Sun Industry Standards Source License 1.1, that is available at:
+ *    http://host-sflow.sourceforge.net/sissl.html
+ * or the InMon sFlow License, that is available at:
+ *    http://www.inmon.com/technology/sflowlicense.txt
+ */
 
 #ifndef SFLOW_H
 #define SFLOW_H 1
diff --git a/lib/sflow_agent.c b/lib/sflow_agent.c
index ba8d2bf99..b02095866 100644
--- a/lib/sflow_agent.c
+++ b/lib/sflow_agent.c
@@ -1,5 +1,9 @@
-/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of the InMon sFlow licence: */
-/* http://www.inmon.com/technology/sflowlicense.txt */
+/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the
+ *   Sun Industry Standards Source License 1.1, that is available at:
+ *    http://host-sflow.sourceforge.net/sissl.html
+ * or the InMon sFlow License, that is available at:
+ *    http://www.inmon.com/technology/sflowlicense.txt
+ */
 
 #include "sflow_api.h"
 
diff --git a/lib/sflow_api.h b/lib/sflow_api.h
index 119cccff3..3cc060b3b 100644
--- a/lib/sflow_api.h
+++ b/lib/sflow_api.h
@@ -1,5 +1,9 @@
-/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of the InMon sFlow licence: */
-/* http://www.inmon.com/technology/sflowlicense.txt */
+/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the
+ *   Sun Industry Standards Source License 1.1, that is available at:
+ *    http://host-sflow.sourceforge.net/sissl.html
+ * or the InMon sFlow License, that is available at:
+ *    http://www.inmon.com/technology/sflowlicense.txt
+ */
 
 #ifndef SFLOW_API_H
 #define SFLOW_API_H 1
diff --git a/lib/sflow_poller.c b/lib/sflow_poller.c
index 092aad10a..d2e415521 100644
--- a/lib/sflow_poller.c
+++ b/lib/sflow_poller.c
@@ -1,5 +1,9 @@
-/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of the InMon sFlow licence: */
-/* http://www.inmon.com/technology/sflowlicense.txt */
+/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the
+ *   Sun Industry Standards Source License 1.1, that is available at:
+ *    http://host-sflow.sourceforge.net/sissl.html
+ * or the InMon sFlow License, that is available at:
+ *    http://www.inmon.com/technology/sflowlicense.txt
+ */
 
 #include "sflow_api.h"
 
diff --git a/lib/sflow_receiver.c b/lib/sflow_receiver.c
index 019f38f7e..3e5a67a06 100644
--- a/lib/sflow_receiver.c
+++ b/lib/sflow_receiver.c
@@ -1,5 +1,9 @@
-/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of the InMon sFlow licence: */
-/* http://www.inmon.com/technology/sflowlicense.txt */
+/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the
+ *   Sun Industry Standards Source License 1.1, that is available at:
+ *    http://host-sflow.sourceforge.net/sissl.html
+ * or the InMon sFlow License, that is available at:
+ *    http://www.inmon.com/technology/sflowlicense.txt
+ */
 
 #ifndef __CHECKER__            /* Don't run sparse on anything in this file. */
 
diff --git a/lib/sflow_sampler.c b/lib/sflow_sampler.c
index 280d54df7..7406cc94a 100644
--- a/lib/sflow_sampler.c
+++ b/lib/sflow_sampler.c
@@ -1,5 +1,9 @@
-/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of the InMon sFlow licence: */
-/* http://www.inmon.com/technology/sflowlicense.txt */
+/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the
+ *   Sun Industry Standards Source License 1.1, that is available at:
+ *    http://host-sflow.sourceforge.net/sissl.html
+ * or the InMon sFlow License, that is available at:
+ *    http://www.inmon.com/technology/sflowlicense.txt
+ */
 
 #include "sflow_api.h"