diff --git a/Documentation/api-html/index.rst b/Documentation/api-html/index.rst
index cf2ef0bb3..9e630fc0e 100644
--- a/Documentation/api-html/index.rst
+++ b/Documentation/api-html/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
 .. _api:
 
 API
diff --git a/Documentation/coding-style.rst b/Documentation/coding-style.rst
index bbc1f2fb1..95ca04f61 100644
--- a/Documentation/coding-style.rst
+++ b/Documentation/coding-style.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
 .. _coding-style-guidelines:
 
 Coding Style Guidelines
diff --git a/Documentation/contributing.rst b/Documentation/contributing.rst
index c7c6f7d2c..1e89aa876 100644
--- a/Documentation/contributing.rst
+++ b/Documentation/contributing.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
 Contributing
 ============
 
diff --git a/Documentation/docs.rst b/Documentation/docs.rst
index 7cb605961..3a7e79eb4 100644
--- a/Documentation/docs.rst
+++ b/Documentation/docs.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
 .. contents::
    :local:
 
diff --git a/Documentation/index.rst b/Documentation/index.rst
index 2c84a5401..4e746bb17 100644
--- a/Documentation/index.rst
+++ b/Documentation/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
 .. Front page matter is defined in the project README file.
 .. include:: ../README.rst
    :start-after: .. section-begin-libcamera
diff --git a/README.rst b/README.rst
index e60d7aec9..656fdbfdc 100644
--- a/README.rst
+++ b/README.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
 .. section-begin-libcamera
 
 ===========