diff --git a/net/Kconfig b/net/Kconfig
index 6e3cde5a311..f5a14192205 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -102,6 +102,17 @@ config NET_BUFSIZE
 		IPv6 hosts are required to be able to handle an MSS of 1220 octets,
 		resulting in a minimum buffer size of of 1220+20+40+14 = 1294
 
+config NET_GUARDSIZE
+	int "Driver I/O guard size"
+	default 2
+	---help---
+		Network drivers often receive packets with garbage at the end and
+		are longer than the size of packet in the TCP header.  The following
+		"fudge" factor increases the size of the I/O buffering by a small
+		amount to allocate slightly oversize packets.  After receipt, the
+		packet size will be chopped down to the size indicated in the TCP
+		header.
+
 source "net/pkt/Kconfig"
 source "net/tcp/Kconfig"
 source "net/udp/Kconfig"