diff --git a/src/main.rs b/src/main.rs
index 9f16c5c..1879934 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,6 @@
 use std::{
     collections::HashMap,
-    os::mikros::{ipc, syscalls, Errno},
+    os::mikros::{ipc, syscalls, Errno, FileOpenMode},
     path::{Path, PathBuf},
 };
 
@@ -36,7 +36,7 @@ impl vfs_rpc::Server for Serv {
         Ok(())
     }
 
-    fn open(&self, path: &Path) -> Result<(u64, u64), Errno> {
+    fn open(&self, path: &Path, mode: FileOpenMode) -> Result<(u64, u64), Errno> {
         if !path.is_absolute() {
             return Err(Errno::EINVAL);
         }
@@ -49,7 +49,7 @@ impl vfs_rpc::Server for Serv {
             .map(|(a, b)| (a.clone(), *b))
             .unwrap();
         let (override_pid, fd) =
-            fs_rpc::Client::new(fs_pid).open(path.strip_prefix(mount_path).unwrap(), mount_id)?;
+            fs_rpc::Client::new(fs_pid).open(path.strip_prefix(mount_path).unwrap(), mode, mount_id)?;
         if let Some(override_pid) = override_pid {
             Ok((override_pid, fd))
         } else {
diff --git a/vfs_rpc/src/lib.rs b/vfs_rpc/src/lib.rs
index f258f12..be0b897 100644
--- a/vfs_rpc/src/lib.rs
+++ b/vfs_rpc/src/lib.rs
@@ -1,7 +1,7 @@
 #![allow(clippy::result_unit_err)]
 
 use std::{
-    os::mikros::{ipc::rpc::{self, IncomingCall}, Errno},
+    os::mikros::{ipc::rpc::{self, IncomingCall}, Errno, FileOpenMode},
     path::Path,
 };
 
@@ -14,7 +14,7 @@ const PROTO: u16 = 2;
 pub trait Server: Send + Sync {
     fn register_fs(&self, from: u64, kind: &str) -> Result<(), Errno>;
     fn mount(&self, dev: &Path, kind: &str, path: &Path) -> Result<(), Errno>;
-    fn open(&self, path: &Path) -> Result<(u64, u64), Errno>;
+    fn open(&self, path: &Path, mode: FileOpenMode) -> Result<(u64, u64), Errno>;
     fn unmount(&self, path: &Path) -> Result<(), Errno>;
     fn open_dir(&self, path: &Path) -> Result<(u64, u64), Errno>;
 }
@@ -47,9 +47,9 @@ impl Client {
         .unwrap()
     }
 
-    pub fn open(self, path: &Path) -> Result<(u64, u64), Errno> {
+    pub fn open(self, path: &Path, mode: FileOpenMode) -> Result<(u64, u64), Errno> {
         postcard::from_bytes(
-            &rpc::send_call(self.0, PROTO, 2, &postcard::to_stdvec(path).unwrap()).get_return(),
+            &rpc::send_call(self.0, PROTO, 2, &postcard::to_stdvec(&(path, mode)).unwrap()).get_return(),
         )
         .unwrap()
     }
@@ -98,8 +98,8 @@ fn callback(call: IncomingCall) {
         let ret = postcard::to_stdvec(&server.mount(dev, kind, path)).unwrap();
         call.send_return(&ret);
     } else if call.func == 2 {
-        let path = postcard::from_bytes(call.args()).unwrap();
-        let ret = postcard::to_stdvec(&server.open(path)).unwrap();
+        let (path, mode) = postcard::from_bytes(call.args()).unwrap();
+        let ret = postcard::to_stdvec(&server.open(path, mode)).unwrap();
         call.send_return(&ret);
     }  else if call.func == 3 {
         let path = postcard::from_bytes(call.args()).unwrap();