diff --git a/water-pod-common/src/lib.rs b/water-pod-common/src/lib.rs
index a0f4b13..d97471f 100644
--- a/water-pod-common/src/lib.rs
+++ b/water-pod-common/src/lib.rs
@@ -3,13 +3,13 @@
 use jiff::{SignedDuration, Timestamp};
 
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
-#[cfg_attr(feature = "defmt", defmt::Format)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum Request {
     TimeSync(TimeSyncMs),
 }
 
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
-#[cfg_attr(feature = "defmt", defmt::Format)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum Response {
     TimeSync(TimeSyncMs),
 }
@@ -35,7 +35,7 @@ impl Response {
 }
 
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
-#[cfg_attr(feature = "defmt", defmt::Format)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct TimeSyncMs {
     t0: i64,
     t1: i64,