diff --git a/src/shared/ethtool-util.c b/src/shared/ethtool-util.c
index f77f6943ca..4ca90615f3 100644
--- a/src/shared/ethtool-util.c
+++ b/src/shared/ethtool-util.c
@@ -501,16 +501,26 @@ static int set_features_bit(
         return found ? 0 : -ENODATA;
 }
 
-int ethtool_set_features(int *ethtool_fd, const char *ifname, const int *features) {
+int ethtool_set_features(int *ethtool_fd, const char *ifname, const int features[static _NET_DEV_FEAT_MAX]) {
         _cleanup_free_ struct ethtool_gstrings *strings = NULL;
         struct ethtool_sfeatures *sfeatures;
         struct ifreq ifr = {};
-        int i, r;
+        bool have = false;
+        int r;
 
         assert(ethtool_fd);
         assert(ifname);
         assert(features);
 
+        for (size_t i = 0; i < _NET_DEV_FEAT_MAX; i++)
+                if (features[i] >= 0) {
+                        have = true;
+                        break;
+                }
+
+        if (!have)
+                return 0;
+
         r = ethtool_connect(ethtool_fd);
         if (r < 0)
                 return r;
@@ -525,8 +535,8 @@ int ethtool_set_features(int *ethtool_fd, const char *ifname, const int *feature
         sfeatures->cmd = ETHTOOL_SFEATURES;
         sfeatures->size = DIV_ROUND_UP(strings->len, 32U);
 
-        for (i = 0; i < _NET_DEV_FEAT_MAX; i++)
-                if (features[i] != -1) {
+        for (size_t i = 0; i < _NET_DEV_FEAT_MAX; i++)
+                if (features[i] >= 0) {
                         r = set_features_bit(strings, netdev_feature_table[i], features[i], sfeatures);
                         if (r < 0) {
                                 log_debug_errno(r, "ethtool: could not find feature, ignoring: %s", netdev_feature_table[i]);
diff --git a/src/shared/ethtool-util.h b/src/shared/ethtool-util.h
index 7d28766624..f0fc40b059 100644
--- a/src/shared/ethtool-util.h
+++ b/src/shared/ethtool-util.h
@@ -88,7 +88,7 @@ int ethtool_get_link_info(int *ethtool_fd, const char *ifname,
 int ethtool_get_permanent_macaddr(int *ethtool_fd, const char *ifname, struct ether_addr *ret);
 int ethtool_set_wol(int *ethtool_fd, const char *ifname, uint32_t wolopts);
 int ethtool_set_nic_buffer_size(int *ethtool_fd, const char *ifname, const netdev_ring_param *ring);
-int ethtool_set_features(int *ethtool_fd, const char *ifname, const int *features);
+int ethtool_set_features(int *ethtool_fd, const char *ifname, const int features[static _NET_DEV_FEAT_MAX]);
 int ethtool_set_glinksettings(int *ethtool_fd, const char *ifname,
                               int autonegotiation, const uint32_t advertise[static N_ADVERTISE],
                               uint64_t speed, Duplex duplex, NetDevPort port);