--- /dev/null
+--- a/tc/Makefile
++++ b/tc/Makefile
+@@ -120,6 +120,9 @@ CFLAGS += -DCONFIG_GACT -DCONFIG_GACT_PR
+ ifneq ($(IPT_LIB_DIR),)
+ CFLAGS += -DIPT_LIB_DIR=\"$(IPT_LIB_DIR)\"
+ endif
++ifneq ($(XT_LIB_DIR),)
++ CFLAGS += -DXT_LIB_DIR=\"$(XT_LIB_DIR)\"
++endif
+
+ YACC := bison
+ LEX := flex