diff --git a/foyer-storage/Cargo.toml b/foyer-storage/Cargo.toml
index a98f4b2c..95a8a68e 100644
--- a/foyer-storage/Cargo.toml
+++ b/foyer-storage/Cargo.toml
@@ -25,13 +25,10 @@ foyer-memory = { version = "0.3", path = "../foyer-memory" }
 futures = "0.3"
 itertools = "0.12"
 lazy_static = "1"
-libc = "0.2"
 lz4 = "1.24"
 memoffset = "0.9"
 parking_lot = { version = "0.12", features = ["arc_lock"] }
-paste = "1.0"
 prometheus = "0.13"
-rand = "0.8.5"
 serde = { workspace = true }
 thiserror = "1"
 tokio = { workspace = true }
diff --git a/foyer-storage/src/device/fs.rs b/foyer-storage/src/device/fs.rs
index 4cd0947c..185d0c90 100644
--- a/foyer-storage/src/device/fs.rs
+++ b/foyer-storage/src/device/fs.rs
@@ -26,6 +26,9 @@ use itertools::Itertools;
 use super::{allocator::AlignedAllocator, asyncify, Device, DeviceError, DeviceResult, IoBuf, IoBufMut, IoRange};
 use crate::region::RegionId;
 
+#[cfg(target_os = "linux")]
+const O_DIRECT: i32 = 0x4000;
+
 #[derive(Debug)]
 pub struct FsDeviceConfigBuilder {
     pub dir: PathBuf,
@@ -301,7 +304,7 @@ impl FsDevice {
                     {
                         use std::os::unix::fs::OpenOptionsExt;
                         if config.direct {
-                            opts.custom_flags(libc::O_DIRECT);
+                            opts.custom_flags(O_DIRECT);
                         }
                     }