diff --git a/doc/usage/cmd/bootm.rst b/doc/usage/cmd/bootm.rst
index a7e5f6c..e409ebc 100644
--- a/doc/usage/cmd/bootm.rst
+++ b/doc/usage/cmd/bootm.rst
@@ -1,5 +1,8 @@
 .. SPDX-License-Identifier: GPL-2.0+
 
+.. index::
+   single: bootm (command)
+
 bootm command
 =============