diff --git a/modules/audio_coding/codecs/red/audio_encoder_copy_red.cc b/modules/audio_coding/codecs/red/audio_encoder_copy_red.cc
index 724bba52d6..634f14d370 100644
--- a/modules/audio_coding/codecs/red/audio_encoder_copy_red.cc
+++ b/modules/audio_coding/codecs/red/audio_encoder_copy_red.cc
@@ -104,7 +104,14 @@ AudioEncoder::EncodedInfo AudioEncoderCopyRed::EncodeImpl(
   RTC_CHECK(info.redundant.empty()) << "Cannot use nested redundant encoders.";
   RTC_DCHECK_EQ(primary_encoded_.size(), info.encoded_bytes);
 
-  if (info.encoded_bytes == 0 || info.encoded_bytes >= kRedMaxPacketSize) {
+  if (info.encoded_bytes == 0) {
+    return info;
+  }
+  if (info.encoded_bytes >= kRedMaxPacketSize) {
+    // Fallback to the primary encoding if the encoded size is more than
+    // what RED can encode as redundancy (1024 bytes). This can happen with
+    // Opus stereo at the highest bitrate which consumes up to 1276 bytes.
+    encoded->AppendData(primary_encoded_);
     return info;
   }
   RTC_DCHECK_GT(max_packet_length_, info.encoded_bytes);
diff --git a/modules/audio_coding/codecs/red/audio_encoder_copy_red_unittest.cc b/modules/audio_coding/codecs/red/audio_encoder_copy_red_unittest.cc
index 8161931a7a..20d85a1d15 100644
--- a/modules/audio_coding/codecs/red/audio_encoder_copy_red_unittest.cc
+++ b/modules/audio_coding/codecs/red/audio_encoder_copy_red_unittest.cc
@@ -315,6 +315,23 @@ TEST_F(AudioEncoderCopyRedTest, CheckPayloadSizes3) {
   }
 }
 
+// Checks that packets encoded larger than REDs 1024 maximum are returned as-is.
+TEST_F(AudioEncoderCopyRedTest, VeryLargePacket) {
+  AudioEncoder::EncodedInfo info;
+  info.payload_type = 63;
+  info.encoded_bytes =
+      1111;  // Must be > 1024 which is the maximum size encodable by RED.
+  info.encoded_timestamp = timestamp_;
+
+  EXPECT_CALL(*mock_encoder_, EncodeImpl(_, _, _))
+      .WillOnce(Invoke(MockAudioEncoder::FakeEncoding(info)));
+
+  Encode();
+  ASSERT_EQ(0u, encoded_info_.redundant.size());
+  ASSERT_EQ(info.encoded_bytes, encoded_info_.encoded_bytes);
+  ASSERT_EQ(info.payload_type, encoded_info_.payload_type);
+}
+
 // Checks that the correct timestamps are returned.
 TEST_F(AudioEncoderCopyRedTest, CheckTimestamps) {
   uint32_t primary_timestamp = timestamp_;