diff --git a/test/fuzzers/BUILD.gn b/test/fuzzers/BUILD.gn
index a063d6a62c..7acbf023e2 100644
--- a/test/fuzzers/BUILD.gn
+++ b/test/fuzzers/BUILD.gn
@@ -546,6 +546,17 @@ webrtc_fuzzer_test("rtp_depacketizer_av1_parse_fuzzer") {
   ]
 }
 
+webrtc_fuzzer_test("rtp_depacketizer_av1_assemble_frame_fuzzer") {
+  sources = [
+    "rtp_depacketizer_av1_assemble_frame_fuzzer.cc",
+  ]
+  deps = [
+    ":fuzz_data_helper",
+    "../../api:array_view",
+    "../../modules/rtp_rtcp",
+  ]
+}
+
 webrtc_fuzzer_test("rtp_dependency_descriptor_fuzzer") {
   sources = [
     "rtp_dependency_descriptor_fuzzer.cc",
diff --git a/test/fuzzers/rtp_depacketizer_av1_assemble_frame_fuzzer.cc b/test/fuzzers/rtp_depacketizer_av1_assemble_frame_fuzzer.cc
new file mode 100644
index 0000000000..c6ff926c78
--- /dev/null
+++ b/test/fuzzers/rtp_depacketizer_av1_assemble_frame_fuzzer.cc
@@ -0,0 +1,39 @@
+/*
+ *  Copyright (c) 2019 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.
+ */
+#include "modules/rtp_rtcp/source/rtp_depacketizer_av1.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <vector>
+
+#include "api/array_view.h"
+#include "test/fuzzers/fuzz_data_helper.h"
+
+namespace webrtc {
+void FuzzOneInput(const uint8_t* data, size_t size) {
+  std::vector<rtc::ArrayView<const uint8_t>> rtp_payloads;
+
+  // Convert plain array of bytes into array of array bytes.
+  test::FuzzDataHelper fuzz_input(rtc::MakeArrayView(data, size));
+  while (fuzz_input.CanReadBytes(sizeof(uint16_t))) {
+    // In practice one rtp payload can be up to ~1200 - 1500 bytes. Majority
+    // of the payload is just copied. To make fuzzing more efficient limit the
+    // size of rtp payload to realistic value.
+    uint16_t next_size = fuzz_input.Read<uint16_t>() % 1200;
+    if (next_size > fuzz_input.BytesLeft()) {
+      next_size = fuzz_input.BytesLeft();
+    }
+    rtp_payloads.push_back(fuzz_input.ReadByteArray(next_size));
+  }
+  // Run code under test.
+  RtpDepacketizerAv1::AssembleFrame(rtp_payloads);
+}
+}  // namespace webrtc