diff --git a/src/crypto/mod.rs b/src/crypto/mod.rs
index cf2dcd2..757d77e 100644
--- a/src/crypto/mod.rs
+++ b/src/crypto/mod.rs
@@ -5,7 +5,9 @@ pub mod hash;
 pub mod random;
 
 pub use aes::{AesCbc, AesCtr};
+#[allow(unused_imports)]
+pub use hash::build_middleproxy_prekey;
 pub use hash::{
-    build_middleproxy_prekey, crc32, crc32c, derive_middleproxy_keys, sha256, sha256_hmac,
+    crc32, crc32c, derive_middleproxy_keys, sha256, sha256_hmac,
 };
 pub use random::SecureRandom;