diff --git a/zerotier-network-hypervisor/src/vl1/mac.rs b/zerotier-network-hypervisor/src/vl1/mac.rs
index dae8a5b26..8d40031c1 100644
--- a/zerotier-network-hypervisor/src/vl1/mac.rs
+++ b/zerotier-network-hypervisor/src/vl1/mac.rs
@@ -6,6 +6,7 @@
  * https://www.zerotier.com/
  */
 
+use std::fmt::Debug;
 use std::hash::{Hash, Hasher};
 use std::num::NonZeroU64;
 use std::str::FromStr;
@@ -17,6 +18,12 @@ use crate::util::buffer::Buffer;
 #[repr(transparent)]
 pub struct MAC(NonZeroU64);
 
+impl Debug for MAC {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(&self.to_string())
+    }
+}
+
 impl MAC {
     #[inline(always)]
     pub fn from_u64(i: u64) -> Option<MAC> {