diff --git a/modules/video_coding/BUILD.gn b/modules/video_coding/BUILD.gn
index c83fd19289..cdf7efaa11 100644
--- a/modules/video_coding/BUILD.gn
+++ b/modules/video_coding/BUILD.gn
@@ -392,6 +392,7 @@ rtc_library("video_coding_utility") {
     "utility/frame_dropper.h",
     "utility/framerate_controller_deprecated.cc",
     "utility/framerate_controller_deprecated.h",
+    "utility/ivf_defines.h",
     "utility/ivf_file_reader.cc",
     "utility/ivf_file_reader.h",
     "utility/ivf_file_writer.cc",
diff --git a/modules/video_coding/utility/ivf_defines.h b/modules/video_coding/utility/ivf_defines.h
new file mode 100644
index 0000000000..83d6691b87
--- /dev/null
+++ b/modules/video_coding/utility/ivf_defines.h
@@ -0,0 +1,23 @@
+/*
+ *  Copyright (c) 2021 The WebRTC 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 in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+/*
+ * This file contains definitions that are common to the IvfFileReader and
+ * IvfFileWriter classes.
+ */
+
+#ifndef MODULES_VIDEO_CODING_UTILITY_IVF_DEFINES_H_
+#define MODULES_VIDEO_CODING_UTILITY_IVF_DEFINES_H_
+
+namespace webrtc {
+constexpr size_t kIvfHeaderSize = 32;
+}  // namespace webrtc
+
+#endif  // MODULES_VIDEO_CODING_UTILITY_IVF_DEFINES_H_
diff --git a/modules/video_coding/utility/ivf_file_reader.cc b/modules/video_coding/utility/ivf_file_reader.cc
index 63925702b5..85d1fa00d7 100644
--- a/modules/video_coding/utility/ivf_file_reader.cc
+++ b/modules/video_coding/utility/ivf_file_reader.cc
@@ -15,12 +15,12 @@
 
 #include "api/video_codecs/video_codec.h"
 #include "modules/rtp_rtcp/source/byte_io.h"
+#include "modules/video_coding/utility/ivf_defines.h"
 #include "rtc_base/logging.h"
 
 namespace webrtc {
 namespace {
 
-constexpr size_t kIvfHeaderSize = 32;
 constexpr size_t kIvfFrameHeaderSize = 12;
 constexpr int kCodecTypeBytesCount = 4;
 
diff --git a/modules/video_coding/utility/ivf_file_writer.cc b/modules/video_coding/utility/ivf_file_writer.cc
index 77c90ee158..c1d84c00a0 100644
--- a/modules/video_coding/utility/ivf_file_writer.cc
+++ b/modules/video_coding/utility/ivf_file_writer.cc
@@ -14,6 +14,7 @@
 
 #include "api/video_codecs/video_codec.h"
 #include "modules/rtp_rtcp/source/byte_io.h"
+#include "modules/video_coding/utility/ivf_defines.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/logging.h"
 
@@ -22,8 +23,6 @@
 
 namespace webrtc {
 
-const size_t kIvfHeaderSize = 32;
-
 IvfFileWriter::IvfFileWriter(FileWrapper file, size_t byte_limit)
     : codec_type_(kVideoCodecGeneric),
       bytes_written_(0),