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-rw-r--r--lib/gui/picopng.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/gui/picopng.h b/lib/gui/picopng.h
index 14c5e28bcc..a17dd14b0c 100644
--- a/lib/gui/picopng.h
+++ b/lib/gui/picopng.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
#ifndef _PICOPNG_H
#define _PICOPNG_H