diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index e8fda1bd4d9df..fed18fd2c50ba 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -1223,6 +1223,7 @@ static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
 		}
 		if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
 			nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX];
+			memset(&md->u, 0x00, sizeof(md->u));
 			md->u.index = nla_get_be32(nla);
 		}
 	} else if (md->version == 2) {