diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.rst
similarity index 96%
rename from Documentation/filesystems/btrfs.txt
rename to Documentation/filesystems/btrfs.rst
index f9dad22d95ce..d0904f602819 100644
--- a/Documentation/filesystems/btrfs.txt
+++ b/Documentation/filesystems/btrfs.rst
@@ -1,3 +1,6 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=====
 BTRFS
 =====
 
diff --git a/Documentation/filesystems/index.rst b/Documentation/filesystems/index.rst
index f74e6b273d9f..dae862cf167e 100644
--- a/Documentation/filesystems/index.rst
+++ b/Documentation/filesystems/index.rst
@@ -54,6 +54,7 @@ Documentation for filesystem implementations.
    autofs-mount-control
    befs
    bfs
+   btrfs
    fuse
    overlayfs
    virtiofs