diff --git a/crates/clawhdf5-format/src/chunked_write.rs b/crates/clawhdf5-format/src/chunked_write.rs
index 6ff0c07..682a1c6 100644
--- a/crates/clawhdf5-format/src/chunked_write.rs
+++ b/crates/clawhdf5-format/src/chunked_write.rs
@@ -4,7 +4,7 @@
 extern crate alloc;
 
 #[cfg(not(feature = "std"))]
-use alloc::{vec, vec::Vec};
+use alloc::{format, vec, vec::Vec};
 
 use crate::checksum::jenkins_lookup3;
 use crate::chunk_cache::{CACHE_LINE_SIZE, align_to_cache_line};