diff --git a/net/Kconfig b/net/Kconfig
index 52e2618..cb600fe 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -174,6 +174,22 @@
 	help
 	  Select maximal length of option 17 root path.
 
+config PROT_TCP
+	bool "TCP stack"
+	help
+	  Enable a generic tcp framework that allows defining a custom
+	  handler for tcp protocol.
+
+config PROT_TCP_SACK
+	bool "TCP SACK support"
+	depends on PROT_TCP
+	help
+	  TCP protocol with SACK. SACK means selective acknowledgements.
+	  By turning this option on TCP will learn what segments are already
+	  received. So that it improves TCP's retransmission efficiency.
+	  This option should be turn on if you want to achieve the fastest
+	  file transfer possible.
+
 endif   # if NET
 
 config SYS_RX_ETH_BUFFER