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-rw-r--r--tools/perf/ui/gtk/gtk.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/ui/gtk/gtk.h b/tools/perf/ui/gtk/gtk.h
index 0a9173ff9a61..9846ea5c831b 100644
--- a/tools/perf/ui/gtk/gtk.h
+++ b/tools/perf/ui/gtk/gtk.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _PERF_GTK_H_
#define _PERF_GTK_H_ 1