diff --git a/pkt-loop-filter/bpf-defs.h b/pkt-loop-filter/bpf-defs.h
index dd1de0f..f1dedbb 100644
--- a/pkt-loop-filter/bpf-defs.h
+++ b/pkt-loop-filter/bpf-defs.h
@@ -27,6 +27,14 @@ struct net {
 	__u64 net_cookie;
 } __attribute__((preserve_access_index));
 
+typedef struct {
+	__s64 counter;
+} atomic64_t;
+
+struct net___old {
+	atomic64_t net_cookie;
+} __attribute__((preserve_access_index));
+
 struct net_device {
 	int ifindex;
 	struct {
@@ -38,4 +46,17 @@ struct netdev_notifier_info {
 	struct net_device *dev;
 } __attribute__((preserve_access_index));
 
+static inline __u64 read_net_cookie(struct net *net)
+{
+	if (bpf_core_field_exists(net->net_cookie)) {
+		return BPF_CORE_READ(net, net_cookie);
+	} else {
+		struct net___old *n_old = (void *)net;
+		atomic64_t cookie_old;
+
+		cookie_old = BPF_CORE_READ(n_old, net_cookie);
+		return cookie_old.counter;
+	}
+}
+
 #endif
diff --git a/pkt-loop-filter/get-bond-active.kern.c b/pkt-loop-filter/get-bond-active.kern.c
index bca35b9..e47d125 100644
--- a/pkt-loop-filter/get-bond-active.kern.c
+++ b/pkt-loop-filter/get-bond-active.kern.c
@@ -15,8 +15,9 @@ SEC("kprobe/bond_select_active_slave")
 int BPF_KPROBE(handle_select_slave, struct bonding *bond)
 {
         struct net_device *dev = BPF_PROBE_READ(bond, dev);
+	struct net *net = BPF_CORE_READ(dev, nd_net.net);
 	int ifindex = BPF_CORE_READ(dev, ifindex);
-	__u64 cookie = BPF_CORE_READ(dev, nd_net.net, net_cookie);
+	__u64 cookie = read_net_cookie(net);
 
         if (cookie == netns_cookie && ifindex == bond_ifindex) {
                 struct net_device *active_dev = BPF_PROBE_READ(bond, curr_active_slave, dev);
diff --git a/pkt-loop-filter/pkt-loop-filter.kern.c b/pkt-loop-filter/pkt-loop-filter.kern.c
index 2a47220..445e52a 100644
--- a/pkt-loop-filter/pkt-loop-filter.kern.c
+++ b/pkt-loop-filter/pkt-loop-filter.kern.c
@@ -156,8 +156,10 @@ SEC("kprobe/bond_change_active_slave")
 int BPF_KPROBE(handle_change_slave, struct bonding *bond, struct slave *new_active)
 {
         struct net_device *dev = BPF_PROBE_READ(bond, dev);
+	struct net *net = BPF_CORE_READ(dev, nd_net.net);
 	int ifindex = BPF_CORE_READ(dev, ifindex);
-	__u64 cookie = BPF_CORE_READ(dev, nd_net.net, net_cookie);
+	__u64 cookie = read_net_cookie(net);
+
 
         if (cookie == netns_cookie && ifindex == bond_ifindex && new_active) {
                 struct net_device *new_dev;