diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index dbe4e41..bd1fede 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * builtin-help.c
  *