diff --git a/libboard_zynq/src/time.rs b/libboard_zynq/src/time.rs
index e012714..b9fc6f3 100644
--- a/libboard_zynq/src/time.rs
+++ b/libboard_zynq/src/time.rs
@@ -1,4 +1,4 @@
-#[derive(Debug, Clone, PartialEq, PartialOrd)]
+#[derive(Debug, Clone, Copy, PartialEq, PartialOrd)]
 pub struct Milliseconds(pub u64);
 
 impl core::ops::Add for Milliseconds {