diff --git a/poky/documentation/ref-manual/ref-classes.rst b/poky/documentation/ref-manual/ref-classes.rst
index b007e34..756df2a 100644
--- a/poky/documentation/ref-manual/ref-classes.rst
+++ b/poky/documentation/ref-manual/ref-classes.rst
@@ -1,4 +1,4 @@
-.. SPDX-License-Identifier: CC-BY-2.0-UK
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
 
 *******
 Classes