diff --git a/src/format/acl.rs b/src/format/acl.rs
index 6cedc68..510e0bc 100644
--- a/src/format/acl.rs
+++ b/src/format/acl.rs
@@ -7,7 +7,7 @@ use endian_trait::Endian;
 pub const READ: u64 = 4;
 pub const WRITE: u64 = 2;
 pub const EXECUTE: u64 = 1;
-pub const NO_MASK: u64 = std::u64::MAX;
+pub const NO_MASK: u64 = u64::MAX;
 
 /// ACL permission bits.
 ///
diff --git a/src/format/mod.rs b/src/format/mod.rs
index d66435e..80af595 100644
--- a/src/format/mod.rs
+++ b/src/format/mod.rs
@@ -150,8 +150,8 @@ impl Header {
             PXAR_ACL_GROUP_OBJ => size_of::<acl::GroupObject>() as u64,
             PXAR_QUOTA_PROJID => size_of::<QuotaProjectId>() as u64,
             PXAR_ENTRY => size_of::<Stat>() as u64,
-            PXAR_PAYLOAD | PXAR_GOODBYE => std::u64::MAX - (size_of::<Self>() as u64),
-            _ => std::u64::MAX - (size_of::<Self>() as u64),
+            PXAR_PAYLOAD | PXAR_GOODBYE => u64::MAX - (size_of::<Self>() as u64),
+            _ => u64::MAX - (size_of::<Self>() as u64),
         }
     }