diff --git a/net/Kconfig b/net/Kconfig
index e411046..d1f6f96 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -89,8 +89,12 @@
 	  to nfmark, but designated for security purposes.
 	  If you are unsure how to answer this question, answer N.
 
+config NET_PTP_CLASSIFY
+	def_bool n
+
 config NETWORK_PHY_TIMESTAMPING
 	bool "Timestamping in PHY devices"
+	select NET_PTP_CLASSIFY
 	help
 	  This allows timestamping of network packets by PHYs with
 	  hardware timestamping capabilities. This option adds some