diff --git a/pvmfw/src/crypto.rs b/pvmfw/src/crypto.rs
index d607bee..3d9c8d1 100644
--- a/pvmfw/src/crypto.rs
+++ b/pvmfw/src/crypto.rs
@@ -21,8 +21,6 @@
 use core::num::NonZeroU32;
 use core::ptr;
 
-use crate::cstr;
-
 use bssl_ffi::CRYPTO_library_init;
 use bssl_ffi::ERR_get_error_line;
 use bssl_ffi::ERR_lib_error_string;
@@ -37,6 +35,7 @@
 use bssl_ffi::EVP_AEAD;
 use bssl_ffi::EVP_AEAD_CTX;
 use bssl_ffi::HKDF;
+use vmbase::cstr;
 
 #[derive(Debug)]
 pub struct Error {