fix a typo

SVN-Revision: 7587

include/netfilter.mk

@@ -75,7 +75,7 @@ IPT_IPOPT-$(CONFIG_NETFILTER_XT_TARGET_MARK) += $(P_XT)xt_MARK
 IPT_IPOPT-$(CONFIG_IP_NF_MATCH_TCPMSS) += $(P_V4)ipt_tcpmss
 IPT_IPOPT-$(CONFIG_NETFILTER_XT_MATCH_TCPMSS) += $(P_XT)xt_tcpmss
 IPT_IPOPT-$(CONFIG_IP_NF_TARGET_TCPMSS) += $(P_V4)ipt_TCPMSS
-IPT_IPOPT-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += $(P_V4)xt_TCPMSS
+IPT_IPOPT-$(CONFIG_NETFILTER_XT_TARGET_TCPMSS) += $(P_XT)xt_TCPMSS
 IPT_IPOPT-$(CONFIG_IP_NF_MATCH_TOS) += $(P_V4)ipt_tos
 IPT_IPOPT-$(CONFIG_IP_NF_MATCH_TIME) += $(P_V4)ipt_time
 IPT_IPOPT-$(CONFIG_IP_NF_TARGET_TOS) += $(P_V4)ipt_TOS