diff --git a/doc/usage/cmd/trace.rst b/doc/usage/cmd/trace.rst
index 3bdf4f0..ad6db12 100644
--- a/doc/usage/cmd/trace.rst
+++ b/doc/usage/cmd/trace.rst
@@ -1,5 +1,8 @@
 .. SPDX-License-Identifier: GPL-2.0+:
 
+.. index::
+   single: trace (command)
+
 trace command
 =============