diff --git a/drivers/xbee/xbee.c b/drivers/xbee/xbee.c
index 1b28ddd346601..7e75592f77b03 100644
--- a/drivers/xbee/xbee.c
+++ b/drivers/xbee/xbee.c
@@ -795,7 +795,7 @@ static void _isr_event(gnrc_netdev_t *netdev, uint32_t event_type)
     hdr->src_l2addr_len = (uint8_t)addr_len;
     hdr->dst_l2addr_len = (uint8_t)addr_len;
     hdr->if_pid = dev->mac_pid;
-    hdr->rssi = dev->rx_buf[1 + addr_len]; // API ID + source address
+    hdr->rssi = dev->rx_buf[1 + addr_len]; /* API ID + source address */
     hdr->lqi = 0;
     gnrc_netif_hdr_set_src_addr(hdr, &(dev->rx_buf[1]), addr_len);
     if (addr_len == 2) {
@@ -822,7 +822,7 @@ static void _isr_event(gnrc_netdev_t *netdev, uint32_t event_type)
     }
 
     DEBUG(", RSSI: -%d dBm", hdr->rssi);
-    DEBUG(", options: %02x", (uint8_t) dev->rx_buf[1 + addr_len + 1]); // API ID + source address + RSSI
+    DEBUG(", options: %02x", (uint8_t) dev->rx_buf[1 + addr_len + 1]); /* API ID + source address + RSSI */
     DEBUG(", payload:");
 
     for (size_t i = 0; i < pkt->size; i++) {