diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs
index e45ff220ae50..3aa1a0cb9bf8 100644
--- a/rust/kernel/str.rs
+++ b/rust/kernel/str.rs
@@ -4,6 +4,11 @@
 
 use core::fmt;
 
+/// Byte string without UTF-8 validity guarantee.
+///
+/// `BStr` is simply an alias to `[u8]`, but has a more evident semantical meaning.
+pub type BStr = [u8];
+
 /// Allows formatting of [`fmt::Arguments`] into a raw buffer.
 ///
 /// It does not fail if callers write past the end of the buffer so that they can calculate the