diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index 9d97102a9347..03d1027fb0e8 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -185,6 +185,9 @@ struct xt_match
 	/* Set this to THIS_MODULE if you are a module, otherwise NULL */
 	struct module *me;
 
+	/* Free to use by each match */
+	unsigned long data;
+
 	char *table;
 	unsigned int matchsize;
 	unsigned int hooks;