diff --git a/plugin/protocol/http/src/http_half.cpp b/plugin/protocol/http/src/http_half.cpp
index 658625b..8044812 100644
--- a/plugin/protocol/http/src/http_half.cpp
+++ b/plugin/protocol/http/src/http_half.cpp
@@ -308,8 +308,15 @@ static int __parser_callback_on_headers_complete(http_parser * parser)
 		/* Does not contain a content-length, passthrough the whole TCP connection */
 		if (unlikely(__str_content_length == NULL))
 		{
-			hf_private->is_passthrough = true;
-			return -1;
+			const struct http_field_name __transfer_encoding_field_name = {TFE_HTTP_TRANSFER_ENCODING, NULL};
+			char *__str_transfer_encoding = (char *)tfe_http_field_read(hf_public, &__transfer_encoding_field_name);
+			if (!(__str_transfer_encoding && strncasecmp(__str_transfer_encoding, "chunked", strlen("chunked")) == 0))
+			{
+				const char * __str_stream = hf_private->session->hc_private->stream->str_stream_info;
+				TFE_LOG_ERROR(g_http_plugin->logger, "the content-length and transfer-encoding field not set, passthrough the whole tcp connection: %s. ", __str_stream);
+				hf_private->is_passthrough = true;
+				return -1;
+			}
 		}
 	}