diff --git a/zebra/ioctl_null.c b/zebra/ioctl_null.c
index 5d046d3..5a8be99 100644
--- a/zebra/ioctl_null.c
+++ b/zebra/ioctl_null.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2006 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 
 #include "zebra/rib.h"
diff --git a/zebra/kernel_null.c b/zebra/kernel_null.c
index cdb6e23..29c7881 100644
--- a/zebra/kernel_null.c
+++ b/zebra/kernel_null.c
@@ -1,5 +1,26 @@
 /* NULL kernel methods for testing. */
 
+/* 
+ * Copyright (C) 2006 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 #include <log.h>
 
diff --git a/zebra/misc_null.c b/zebra/misc_null.c
index 0680726..b4416e6 100644
--- a/zebra/misc_null.c
+++ b/zebra/misc_null.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2006 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 
 #include "prefix.h"
diff --git a/zebra/redistribute_null.c b/zebra/redistribute_null.c
index 54198c8..c45ebe1 100644
--- a/zebra/redistribute_null.c
+++ b/zebra/redistribute_null.c
@@ -1,3 +1,24 @@
+/* 
+ * Copyright (C) 2006 Sun Microsystems, Inc.
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
 #include <zebra.h>
 #include "zebra/rib.h"
 #include "zebra/zserv.h"