diff --git a/unstable/fullscreen-shell/fullscreen-shell-unstable-v1.xml b/unstable/fullscreen-shell/fullscreen-shell-unstable-v1.xml
index 7d141ee..1bca7b7 100644
--- a/unstable/fullscreen-shell/fullscreen-shell-unstable-v1.xml
+++ b/unstable/fullscreen-shell/fullscreen-shell-unstable-v1.xml
@@ -1,6 +1,31 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <protocol name="fullscreen_shell_unstable_v1">
 
+  <copyright>
+    Copyright © 2016 Yong Bakos
+    Copyright © 2015 Jason Ekstrand
+    Copyright © 2015 Jonas Ådahl
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
   <interface name="zwp_fullscreen_shell_v1" version="1">
     <description summary="displays a single surface per output">
       Displays a single surface per output.