diff --git a/pvmfw/src/helpers.rs b/pvmfw/src/helpers.rs
index bace8da..403c7e4 100644
--- a/pvmfw/src/helpers.rs
+++ b/pvmfw/src/helpers.rs
@@ -31,6 +31,7 @@
     ($sysreg:literal) => {{
         let mut r: usize;
         // Safe because it reads a system register and does not affect Rust.
+        #[allow(unused_unsafe)] // In case the macro is used within an unsafe block.
         unsafe {
             core::arch::asm!(
                 concat!("mrs {}, ", $sysreg),