1 files changed, 1 insertions, 1 deletions

diff --git a/examples/std/src/tuntap.rs b/examples/std/src/tuntap.rs
index 328479e68..09a4be070 100644
--- a/examples/std/src/tuntap.rs
+++ b/examples/std/src/tuntap.rs
@@ -219,7 +219,7 @@ impl Device for TunTapDevice {
         LinkState::Up
     }
 
-    fn ethernet_address(&mut self) -> [u8; 6] {
+    fn ethernet_address(&self) -> [u8; 6] {
         [0x02, 0x03, 0x04, 0x05, 0x06, 0x07]
     }
 }