diff --git a/source/common/http/http1/codec_impl.cc b/source/common/http/http1/codec_impl.cc
index 299f7c517a46..9c0e8d8e8034 100644
--- a/source/common/http/http1/codec_impl.cc
+++ b/source/common/http/http1/codec_impl.cc
@@ -650,8 +650,8 @@ int ConnectionImpl::onHeadersCompleteBase() {
     absl::string_view encoding = current_header_map_->TransferEncoding()->value().getStringView();
     if (Runtime::runtimeFeatureEnabled(
             "envoy.reloadable_features.reject_unsupported_transfer_encodings") &&
-        encoding != Headers::get().TransferEncodingValues.Identity &&
-        encoding != Headers::get().TransferEncodingValues.Chunked) {
+        !absl::EqualsIgnoreCase(encoding, Headers::get().TransferEncodingValues.Identity) &&
+        !absl::EqualsIgnoreCase(encoding, Headers::get().TransferEncodingValues.Chunked)) {
       error_code_ = Http::Code::NotImplemented;
       sendProtocolError();
       throw CodecProtocolException("http/1.1 protocol error: unsupported transfer encoding");
diff --git a/test/common/http/http1/codec_impl_test.cc b/test/common/http/http1/codec_impl_test.cc
index 85857378d0f3..d525060ece64 100644
--- a/test/common/http/http1/codec_impl_test.cc
+++ b/test/common/http/http1/codec_impl_test.cc
@@ -319,6 +319,30 @@ TEST_F(Http1ServerConnectionImplTest, ChunkedBody) {
   EXPECT_EQ(0U, buffer.length());
 }
 
+TEST_F(Http1ServerConnectionImplTest, ChunkedBodyCase) {
+  initialize();
+
+  InSequence sequence;
+
+  NiceMock<MockStreamDecoder> decoder;
+  EXPECT_CALL(callbacks_, newStream(_, _)).WillOnce(ReturnRef(decoder));
+
+  TestHeaderMapImpl expected_headers{
+      {":path", "/"},
+      {":method", "POST"},
+      {"transfer-encoding", "Chunked"},
+  };
+  EXPECT_CALL(decoder, decodeHeaders_(HeaderMapEqual(&expected_headers), false)).Times(1);
+  Buffer::OwnedImpl expected_data("Hello World");
+  EXPECT_CALL(decoder, decodeData(BufferEqual(&expected_data), false)).Times(1);
+  EXPECT_CALL(decoder, decodeData(_, true)).Times(1);
+
+  Buffer::OwnedImpl buffer(
+      "POST / HTTP/1.1\r\ntransfer-encoding: Chunked\r\n\r\nb\r\nHello World\r\n0\r\n\r\n");
+  codec_->dispatch(buffer);
+  EXPECT_EQ(0U, buffer.length());
+}
+
 // Currently http_parser does not support chained transfer encodings.
 TEST_F(Http1ServerConnectionImplTest, IdentityAndChunkedBody) {
   initialize();