diff --git a/pipeline/inputs/syslog.md b/pipeline/inputs/syslog.md
index 940f7ea1d..3d397ee57 100644
--- a/pipeline/inputs/syslog.md
+++ b/pipeline/inputs/syslog.md
@@ -8,17 +8,19 @@ The plugin supports the following configuration parameters:
 
 | Key                   | Description                                                                                                                                                                                                                                                                       | Default              |
 |:----------------------|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:---------------------|
-| `Mode`                | Defines transport protocol mode: UDP over Unix socket (`unix_udp`), TCP over Unix socket (`unix_tcp`), `tcp`, or `udp`                                                                                                                                                            | `unix_udp`           |
-| `Listen`              | If `Mode` is set to `tcp` or `udp`, specify the network interface to bind.                                                                                                                                                                                                        | `0.0.0.0`            |
-| `Port`                | If `Mode` is set to `tcp` or `udp`, specify the TCP port to listen for incoming connections.                                                                                                                                                                                      | `5140`               |
-| `Path`                | If `Mode` is set to `unix_tcp` or `unix_udp`, set the absolute path to the Unix socket file.                                                                                                                                                                                      | _none_               |
-| `Unix_Perm`           | If `Mode` is set to `unix_tcp` or `unix_udp`, set the permission of the Unix socket file.                                                                                                                                                                                         | `0644`               |
-| `Parser`              | Specify an alternative parser for the message. If `Mode` is set to `tcp` or `udp` then the default parser is `syslog-rfc5424`. Otherwise, `syslog-rfc3164-local` is used. If your syslog` messages have fractional seconds set this parser value to `syslog-rfc5424` instead.     | _none_               |
-| `Buffer_Chunk_Size`   | By default, the buffer to store the incoming `syslog` messages. Doesn't allocate the maximum memory allowed, instead it allocates memory when required. The rounds of allocations are set by `Buffer_Chunk_Size`. There are considerations when using `udp` or `unix_udp` mode.   | `32KB` (set in code) |
-| `Buffer_Max_Size`     | Specify the maximum buffer size to receive a `syslog` message. If not set, the default size is the value of `Buffer_Chunk_Size`.                                                                                                                                                  | _none_               |
-| `Receive_Buffer_Size` | Specify the maximum socket receive buffer size. If not set, the default value is OS-dependant, but generally too low to accept thousands of syslog messages per second without loss on `udp` or `unix_udp` sockets. For Linux, the value is capped by `sysctl net.core.rmem_max`. | _none_               |
-| `Source_Address_Key`  | Specify the key where the source address will be injected.                                                                                                                                                                                                                        | _none_               |
-| `Threaded`            | Indicates whether to run this input in its own [thread](../../administration/multithreading.md#inputs).                                                                                                                                                                           | `false`              |
+| `buffer_chunk_size`   | By default, the buffer to store the incoming `syslog` messages. Doesn't allocate the maximum memory allowed, instead it allocates memory when required. The rounds of allocations are set by `buffer_chunk_size`. There are considerations when using `udp` or `unix_udp` mode.   | `32KB` (set in code) |
+| `buffer_max_size`     | Specify the maximum buffer size to receive a `syslog` message. If not set, the default size is the value of `buffer_chunk_size`.                                                                                                                                                  | _none_               |
+| `format`              | Specify the TCP framing format. Set to `octet_counting` for RFC 6587 compliant octet-counting framing, or `newline` for newline-delimited framing. Only applies to TCP modes (`tcp` or `unix_tcp`).                                                                               | `newline`            |
+| `listen`              | If `mode` is set to `tcp` or `udp`, specify the network interface to bind.                                                                                                                                                                                                        | `0.0.0.0`            |
+| `mode`                | Defines transport protocol mode: UDP over Unix socket (`unix_udp`), TCP over Unix socket (`unix_tcp`), `tcp`, or `udp`                                                                                                                                                            | `unix_udp`           |
+| `parser`              | Specify an alternative parser for the message. If `mode` is set to `tcp` or `udp` then the default parser is `syslog-rfc5424`. Otherwise, `syslog-rfc3164-local` is used. If your syslog messages have fractional seconds set this parser value to `syslog-rfc5424` instead.     | _none_               |
+| `path`                | If `mode` is set to `unix_tcp` or `unix_udp`, set the absolute path to the Unix socket file.                                                                                                                                                                                      | _none_               |
+| `port`                | If `mode` is set to `tcp` or `udp`, specify the TCP port to listen for incoming connections.                                                                                                                                                                                      | `5140`               |
+| `raw_message_key`     | Specify the key where the original raw `syslog` message will be preserved.                                                                                                                                                                                                        | _none_               |
+| `receive_buffer_size` | Specify the maximum socket receive buffer size. If not set, the default value is OS-dependant, but generally too low to accept thousands of syslog messages per second without loss on `udp` or `unix_udp` sockets. For Linux, the value is capped by `sysctl net.core.rmem_max`. | _none_               |
+| `source_address_key`  | Specify the key where the source address will be injected.                                                                                                                                                                                                                        | _none_               |
+| `threaded`            | Indicates whether to run this input in its own [thread](../../administration/multithreading.md#inputs).                                                                                                                                                                           | `false`              |
+| `unix_perm`           | If `mode` is set to `unix_tcp` or `unix_udp`, set the permission of the Unix socket file.                                                                                                                                                                                         | `0644`               |
 
 ### Considerations
 
@@ -251,4 +253,4 @@ $OMUxSockSocket /tmp/fluent-bit.sock
 *.* :omuxsock:
 ```
 
-Make sure that the socket file is readable by `rsyslog` by modifying `Unix_Perm` key.
+Make sure that the socket file is readable by `rsyslog` by modifying `unix_perm` key.