diff --git a/quic/api/test/QuicTransportTest.cpp b/quic/api/test/QuicTransportTest.cpp
index 1c3cabebc..d9cb81f24 100644
--- a/quic/api/test/QuicTransportTest.cpp
+++ b/quic/api/test/QuicTransportTest.cpp
@@ -2103,7 +2103,7 @@ TEST_F(QuicTransportTest, RstStream) {
       continue;
     }
     EXPECT_EQ(streamId, rstFrame->streamId);
-    EXPECT_EQ(0, rstFrame->offset);
+    EXPECT_EQ(0, rstFrame->finalSize);
     EXPECT_EQ(GenericApplicationErrorCode::UNKNOWN, rstFrame->errorCode);
     rstFound = true;
   }
@@ -2870,7 +2870,7 @@ TEST_F(QuicTransportTest, RstWrittenStream) {
       continue;
     }
     EXPECT_EQ(streamId, rstStream->streamId);
-    EXPECT_EQ(currentWriteOffset, rstStream->offset);
+    EXPECT_EQ(currentWriteOffset, rstStream->finalSize);
     EXPECT_EQ(GenericApplicationErrorCode::UNKNOWN, rstStream->errorCode);
     foundReset = true;
   }
@@ -2975,7 +2975,7 @@ TEST_F(QuicTransportTest, WriteAfterSendRst) {
       continue;
     }
     EXPECT_EQ(streamId, rstFrame->streamId);
-    EXPECT_EQ(currentWriteOffset, rstFrame->offset);
+    EXPECT_EQ(currentWriteOffset, rstFrame->finalSize);
     EXPECT_EQ(GenericApplicationErrorCode::UNKNOWN, rstFrame->errorCode);
     foundReset = true;
   }
diff --git a/quic/codec/Decode.cpp b/quic/codec/Decode.cpp
index 02e811c71..e9775af1f 100644
--- a/quic/codec/Decode.cpp
+++ b/quic/codec/Decode.cpp
@@ -376,15 +376,15 @@ RstStreamFrame decodeRstStreamFrame(folly::io::Cursor& cursor) {
         quic::TransportErrorCode::FRAME_ENCODING_ERROR,
         quic::FrameType::RST_STREAM);
   }
-  auto offset = decodeQuicInteger(cursor);
-  if (!offset) {
+  auto finalSize = decodeQuicInteger(cursor);
+  if (!finalSize) {
     throw QuicTransportException(
         "Bad offset",
         quic::TransportErrorCode::FRAME_ENCODING_ERROR,
         quic::FrameType::RST_STREAM);
   }
   return RstStreamFrame(
-      folly::to<StreamId>(streamId->first), errorCode, offset->first);
+      folly::to<StreamId>(streamId->first), errorCode, finalSize->first);
 }
 
 StopSendingFrame decodeStopSendingFrame(folly::io::Cursor& cursor) {
diff --git a/quic/codec/QuicWriteCodec.cpp b/quic/codec/QuicWriteCodec.cpp
index 66a7c8e80..7710bb90f 100644
--- a/quic/codec/QuicWriteCodec.cpp
+++ b/quic/codec/QuicWriteCodec.cpp
@@ -816,7 +816,7 @@ size_t writeFrame(QuicWriteFrame&& frame, PacketBuilderInterface& builder) {
       RstStreamFrame& rstStreamFrame = *frame.asRstStreamFrame();
       QuicInteger intFrameType(static_cast<uint8_t>(FrameType::RST_STREAM));
       QuicInteger streamId(rstStreamFrame.streamId);
-      QuicInteger offset(rstStreamFrame.offset);
+      QuicInteger offset(rstStreamFrame.finalSize);
       QuicInteger errorCode(static_cast<uint64_t>(rstStreamFrame.errorCode));
       size_t errorSize = errorCode.getSize();
       auto rstStreamFrameSize = intFrameType.getSize() + errorSize +
diff --git a/quic/codec/Types.h b/quic/codec/Types.h
index 0d20282c1..1d3601004 100644
--- a/quic/codec/Types.h
+++ b/quic/codec/Types.h
@@ -298,17 +298,17 @@ struct WriteAckFrameResult {
 struct RstStreamFrame {
   StreamId streamId;
   ApplicationErrorCode errorCode;
-  uint64_t offset;
+  uint64_t finalSize;
 
   RstStreamFrame(
       StreamId streamIdIn,
       ApplicationErrorCode errorCodeIn,
-      uint64_t offsetIn)
-      : streamId(streamIdIn), errorCode(errorCodeIn), offset(offsetIn) {}
+      uint64_t finalSizeIn)
+      : streamId(streamIdIn), errorCode(errorCodeIn), finalSize(finalSizeIn) {}
 
   bool operator==(const RstStreamFrame& rhs) const {
     return streamId == rhs.streamId && errorCode == rhs.errorCode &&
-        offset == rhs.offset;
+        finalSize == rhs.finalSize;
   }
 };
 
diff --git a/quic/codec/test/QuicWriteCodecTest.cpp b/quic/codec/test/QuicWriteCodecTest.cpp
index f9ed25f8d..ce8b15306 100644
--- a/quic/codec/test/QuicWriteCodecTest.cpp
+++ b/quic/codec/test/QuicWriteCodecTest.cpp
@@ -2097,7 +2097,7 @@ TEST_F(QuicWriteCodecTest, WriteRstStream) {
   auto& resultRstStreamFrame = *regularPacket.frames[0].asRstStreamFrame();
   EXPECT_EQ(errorCode, resultRstStreamFrame.errorCode);
   EXPECT_EQ(id, resultRstStreamFrame.streamId);
-  EXPECT_EQ(offset, resultRstStreamFrame.offset);
+  EXPECT_EQ(offset, resultRstStreamFrame.finalSize);
 
   auto wireBuf = std::move(builtOut.second);
   BufQueue queue;
@@ -2106,7 +2106,7 @@ TEST_F(QuicWriteCodecTest, WriteRstStream) {
   auto& wireRstStreamFrame = *decodedFrame.asRstStreamFrame();
   EXPECT_EQ(errorCode, wireRstStreamFrame.errorCode);
   EXPECT_EQ(id, wireRstStreamFrame.streamId);
-  EXPECT_EQ(offset, wireRstStreamFrame.offset);
+  EXPECT_EQ(offset, wireRstStreamFrame.finalSize);
   // At last, verify there is nothing left in the wire format bytes:
   EXPECT_EQ(queue.chainLength(), 0);
 }
diff --git a/quic/logging/BaseQLogger.cpp b/quic/logging/BaseQLogger.cpp
index 2f9cff5c0..7bcb21d9a 100644
--- a/quic/logging/BaseQLogger.cpp
+++ b/quic/logging/BaseQLogger.cpp
@@ -115,7 +115,7 @@ std::unique_ptr<QLogPacketEvent> BaseQLogger::createPacketEvent(
       case QuicFrame::Type::RstStreamFrame: {
         const auto& frame = *quicFrame.asRstStreamFrame();
         event->frames.push_back(std::make_unique<RstStreamFrameLog>(
-            frame.streamId, frame.errorCode, frame.offset));
+            frame.streamId, frame.errorCode, frame.finalSize));
         break;
       }
       case QuicFrame::Type::ConnectionCloseFrame: {
@@ -242,7 +242,7 @@ std::unique_ptr<QLogPacketEvent> BaseQLogger::createPacketEvent(
       case QuicWriteFrame::Type::RstStreamFrame: {
         const RstStreamFrame& frame = *quicFrame.asRstStreamFrame();
         event->frames.push_back(std::make_unique<RstStreamFrameLog>(
-            frame.streamId, frame.errorCode, frame.offset));
+            frame.streamId, frame.errorCode, frame.finalSize));
         break;
       }
       case QuicWriteFrame::Type::ConnectionCloseFrame: {
diff --git a/quic/loss/test/QuicLossFunctionsTest.cpp b/quic/loss/test/QuicLossFunctionsTest.cpp
index 7906a2e74..edc21fd6f 100644
--- a/quic/loss/test/QuicLossFunctionsTest.cpp
+++ b/quic/loss/test/QuicLossFunctionsTest.cpp
@@ -944,7 +944,7 @@ TEST_F(QuicLossFunctionsTest, TestMarkRstLoss) {
   auto& retxRstFrame = conn->pendingEvents.resets.at(stream->id);
   EXPECT_EQ(stream->id, retxRstFrame.streamId);
   EXPECT_EQ(GenericApplicationErrorCode::UNKNOWN, retxRstFrame.errorCode);
-  EXPECT_EQ(currentOffset, retxRstFrame.offset);
+  EXPECT_EQ(currentOffset, retxRstFrame.finalSize);
 
   // write again:
   writeQuicDataToSocket(
@@ -967,7 +967,7 @@ TEST_F(QuicLossFunctionsTest, TestMarkRstLoss) {
     }
     EXPECT_EQ(stream->id, resetFrame->streamId);
     EXPECT_EQ(GenericApplicationErrorCode::UNKNOWN, resetFrame->errorCode);
-    EXPECT_EQ(currentOffset, resetFrame->offset);
+    EXPECT_EQ(currentOffset, resetFrame->finalSize);
     rstFound = true;
   }
   EXPECT_TRUE(rstFound);
diff --git a/quic/server/test/QuicServerTransportTest.cpp b/quic/server/test/QuicServerTransportTest.cpp
index f77a33de7..422c04e88 100644
--- a/quic/server/test/QuicServerTransportTest.cpp
+++ b/quic/server/test/QuicServerTransportTest.cpp
@@ -3318,7 +3318,7 @@ TEST_F(QuicServerTransportTest, ResetDSRStream) {
       continue;
     }
     EXPECT_EQ(streamId, rstStream->streamId);
-    EXPECT_GT(rstStream->offset, 200);
+    EXPECT_GT(rstStream->finalSize, 200);
     EXPECT_EQ(GenericApplicationErrorCode::UNKNOWN, rstStream->errorCode);
     foundReset = true;
   }
diff --git a/quic/state/stream/StreamStateFunctions.cpp b/quic/state/stream/StreamStateFunctions.cpp
index 17b48d393..f66b1d411 100644
--- a/quic/state/stream/StreamStateFunctions.cpp
+++ b/quic/state/stream/StreamStateFunctions.cpp
@@ -32,23 +32,24 @@ void resetQuicStream(QuicStreamState& stream, ApplicationErrorCode error) {
 
 void onResetQuicStream(QuicStreamState& stream, const RstStreamFrame& frame) {
   if (stream.finalReadOffset &&
-      stream.finalReadOffset.value() != frame.offset) {
+      stream.finalReadOffset.value() != frame.finalSize) {
     throw QuicTransportException(
         "Read offset mismatch, " +
             folly::to<std::string>(stream.finalReadOffset.value()) +
-            " != " + folly::to<std::string>(frame.offset),
+            " != " + folly::to<std::string>(frame.finalSize),
         TransportErrorCode::FINAL_SIZE_ERROR);
   }
   // Mark eofoffset:
-  if (stream.maxOffsetObserved > frame.offset) {
+  if (stream.maxOffsetObserved > frame.finalSize) {
     throw QuicTransportException(
         "Reset in middle of stream", TransportErrorCode::FINAL_SIZE_ERROR);
   }
   // Verify that the flow control is consistent.
-  updateFlowControlOnStreamData(stream, stream.maxOffsetObserved, frame.offset);
+  updateFlowControlOnStreamData(
+      stream, stream.maxOffsetObserved, frame.finalSize);
   // Drop read buffer:
   stream.readBuffer.clear();
-  stream.finalReadOffset = frame.offset;
+  stream.finalReadOffset = frame.finalSize;
   stream.streamReadError = frame.errorCode;
   bool appReadAllBytes = stream.currentReadOffset > *stream.finalReadOffset;
   if (!appReadAllBytes) {
@@ -56,8 +57,8 @@ void onResetQuicStream(QuicStreamState& stream, const RstStreamFrame& frame) {
     // all the bytes until FIN, so we don't need to do anything for the read
     // side of the flow controller.
     auto lastReadOffset = stream.currentReadOffset;
-    stream.currentReadOffset = frame.offset;
-    stream.maxOffsetObserved = frame.offset;
+    stream.currentReadOffset = frame.finalSize;
+    stream.maxOffsetObserved = frame.finalSize;
     updateFlowControlOnRead(stream, lastReadOffset, Clock::now());
   }
   stream.conn.streamManager->updateReadableStreams(stream);
diff --git a/quic/state/test/QuicStreamFunctionsTest.cpp b/quic/state/test/QuicStreamFunctionsTest.cpp
index 7c2e1e2e7..b95db66f8 100644
--- a/quic/state/test/QuicStreamFunctionsTest.cpp
+++ b/quic/state/test/QuicStreamFunctionsTest.cpp
@@ -2135,7 +2135,7 @@ TEST_F(QuicServerStreamFunctionsTest, TestAppendPendingStreamResetAllData) {
   appendPendingStreamReset(conn, stream, GenericApplicationErrorCode::UNKNOWN);
   auto rst = conn.pendingEvents.resets.at(id);
   EXPECT_EQ(rst.errorCode, GenericApplicationErrorCode::UNKNOWN);
-  EXPECT_EQ(rst.offset, len);
+  EXPECT_EQ(rst.finalSize, len);
 }
 
 TEST_F(
@@ -2154,7 +2154,7 @@ TEST_F(
   appendPendingStreamReset(conn, stream, GenericApplicationErrorCode::UNKNOWN);
   auto rst = conn.pendingEvents.resets.at(id);
   EXPECT_EQ(rst.errorCode, GenericApplicationErrorCode::UNKNOWN);
-  EXPECT_EQ(rst.offset, len);
+  EXPECT_EQ(rst.finalSize, len);
 }
 
 TEST_P(QuicStreamFunctionsTestBase, LargestWriteOffsetSeenFIN) {