diff --git a/examples/forward.rs b/examples/forward.rs
index ada5200..0e9b876 100644
--- a/examples/forward.rs
+++ b/examples/forward.rs
@@ -55,7 +55,8 @@ fn main() {
 
     #[cfg(target_os = "linux")]
     |opts: Options| {
-        let (input, output) = open_can_interface(&opts.input_interface, &opts.output_interface);
+        let (mut input, mut output) =
+            open_can_interface(&opts.input_interface, &opts.output_interface);
         input
             .set_nonblocking(true)
             .expect("Could not set input bus to non-blocking!");
@@ -73,5 +74,5 @@ fn main() {
                 Err(_err) => continue,
             }
         }
-    }
+    };
 }