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diff --git a/third_party/jpeg-xl/lib/jxl/enc_icc_codec.h b/third_party/jpeg-xl/lib/jxl/enc_icc_codec.h
new file mode 100644
index 0000000000..c22cf5994e
--- /dev/null
+++ b/third_party/jpeg-xl/lib/jxl/enc_icc_codec.h
@@ -0,0 +1,33 @@
+// 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_JXL_ENC_ICC_CODEC_H_
+#define LIB_JXL_ENC_ICC_CODEC_H_
+
+// Compressed representation of ICC profiles.
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "lib/jxl/base/compiler_specific.h"
+#include "lib/jxl/base/padded_bytes.h"
+#include "lib/jxl/base/status.h"
+#include "lib/jxl/dec_bit_reader.h"
+#include "lib/jxl/enc_bit_writer.h"
+
+namespace jxl {
+
+struct AuxOut;
+
+// Should still be called if `icc.empty()` - if so, writes only 1 bit.
+Status WriteICC(const PaddedBytes& icc, BitWriter* JXL_RESTRICT writer,
+                size_t layer, AuxOut* JXL_RESTRICT aux_out);
+
+// Exposed only for testing
+Status PredictICC(const uint8_t* icc, size_t size, PaddedBytes* result);
+
+}  // namespace jxl
+
+#endif  // LIB_JXL_ENC_ICC_CODEC_H_