diff --git a/embassy-stm32/build.rs b/embassy-stm32/build.rs
index 38413acb..02d47da8 100644
--- a/embassy-stm32/build.rs
+++ b/embassy-stm32/build.rs
@@ -773,7 +773,7 @@ impl<T: Iterator> IteratorExt for T {
 fn make_table(out: &mut String, name: &str, data: &Vec<Vec<String>>) {
     write!(
         out,
-        "
+        "#[allow(unused)]
 macro_rules! {} {{
     ($($pat:tt => $code:tt;)*) => {{
         macro_rules! __{}_inner {{