diff --git a/cpu/native/netdev_tap/netdev_tap.c b/cpu/native/netdev_tap/netdev_tap.c
index e686093a5f..616fd32ad1 100644
--- a/cpu/native/netdev_tap/netdev_tap.c
+++ b/cpu/native/netdev_tap/netdev_tap.c
@@ -300,7 +300,8 @@ static int _send(netdev_t *netdev, const iolist_t *iolist)
 
 void netdev_tap_setup(netdev_tap_t *dev, const netdev_tap_params_t *params) {
     dev->netdev.driver = &netdev_driver_tap;
-    strncpy(dev->tap_name, *(params->tap_name), IFNAMSIZ);
+    strncpy(dev->tap_name, *(params->tap_name), IFNAMSIZ - 1);
+    dev->tap_name[IFNAMSIZ - 1] = '\0';
 }
 
 static void _tap_isr(int fd, void *arg) {