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diff --git a/third_party/jpeg-xl/lib/jpegli/idct.h b/third_party/jpeg-xl/lib/jpegli/idct.h
new file mode 100644
index 0000000000..c2ec6d18dc
--- /dev/null
+++ b/third_party/jpeg-xl/lib/jpegli/idct.h
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+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef LIB_JPEGLI_IDCT_H_
+#define LIB_JPEGLI_IDCT_H_
+
+#include "lib/jpegli/common.h"
+#include "lib/jxl/base/compiler_specific.h"
+
+namespace jpegli {
+
+void ChooseInverseTransform(j_decompress_ptr cinfo);
+
+}  // namespace jpegli
+
+#endif  // LIB_JPEGLI_IDCT_H_