diff --git a/core/io/io_uring.rs b/core/io/io_uring.rs
index b0f1ed269..be8083032 100644
--- a/core/io/io_uring.rs
+++ b/core/io/io_uring.rs
@@ -354,10 +354,10 @@ impl File for UringFile {
         Ok(self.file.metadata()?.len())
     }
 
-    fn truncate(&self, len: u64, c: Completion) -> Result<Arc<Completion>> {
+    fn truncate(&self, len: usize, c: Completion) -> Result<Arc<Completion>> {
         let mut io = self.io.borrow_mut();
         let truncate = with_fd!(self, |fd| {
-            io_uring::opcode::Ftruncate::new(fd, len)
+            io_uring::opcode::Ftruncate::new(fd, len as u64)
                 .build()
                 .user_data(io.ring.get_key())
         });
diff --git a/core/io/memory.rs b/core/io/memory.rs
index 93c248571..037a0b0f7 100644
--- a/core/io/memory.rs
+++ b/core/io/memory.rs
@@ -174,7 +174,7 @@ impl File for MemoryFile {
         Ok(c)
     }
 
-    fn truncate(&self, len: u64, c: Completion) -> Result<Arc<Completion>> {
+    fn truncate(&self, len: usize, c: Completion) -> Result<Arc<Completion>> {
         let new_size = len as usize;
         if new_size < self.size.get() {
             // Truncate pages
diff --git a/core/io/mod.rs b/core/io/mod.rs
index 0113db0eb..10b64339d 100644
--- a/core/io/mod.rs
+++ b/core/io/mod.rs
@@ -19,7 +19,7 @@ pub trait File: Send + Sync {
         -> Result<Completion>;
     fn sync(&self, c: Completion) -> Result<Completion>;
     fn size(&self) -> Result<u64>;
-    fn truncate(&self, len: u64, c: Completion) -> Result<Arc<Completion>>;
+    fn truncate(&self, len: usize, c: Completion) -> Result<Arc<Completion>>;
 }
 
 #[derive(Debug, Copy, Clone, PartialEq)]
diff --git a/core/io/unix.rs b/core/io/unix.rs
index 0eee99321..a98943836 100644
--- a/core/io/unix.rs
+++ b/core/io/unix.rs
@@ -452,9 +452,9 @@ impl File for UnixFile<'_> {
     }
 
     #[instrument(err, skip_all, level = Level::INFO)]
-    fn truncate(&self, len: u64, c: Completion) -> Result<Arc<Completion>> {
+    fn truncate(&self, len: usize, c: Completion) -> Result<Arc<Completion>> {
         let file = self.file.borrow();
-        let result = file.set_len(len);
+        let result = file.set_len(len as u64);
         let c = Arc::new(c);
         match result {
             Ok(()) => {
diff --git a/core/io/vfs.rs b/core/io/vfs.rs
index a34d8dda1..50873636e 100644
--- a/core/io/vfs.rs
+++ b/core/io/vfs.rs
@@ -166,7 +166,7 @@ impl File for VfsFileImpl {
         }
     }
 
-    fn truncate(&self, len: u64, c: Completion) -> Result<Arc<Completion>> {
+    fn truncate(&self, len: usize, c: Completion) -> Result<Arc<Completion>> {
         if self.vfs.is_null() {
             return Err(LimboError::ExtensionError("VFS is null".to_string()));
         }
diff --git a/macros/src/ext/vfs_derive.rs b/macros/src/ext/vfs_derive.rs
index eb2115ac1..5e813410a 100644
--- a/macros/src/ext/vfs_derive.rs
+++ b/macros/src/ext/vfs_derive.rs
@@ -192,17 +192,17 @@ pub fn derive_vfs_module(input: TokenStream) -> TokenStream {
         }
 
         #[no_mangle]
-        pub unsafe extern "C" fn #trunc_fn_name(file_ptr: *const ::std::ffi::c_void, len: i64) -> i32 {
+        pub unsafe extern "C" fn #trunc_fn_name(file_ptr: *const ::std::ffi::c_void, len: i64) -> ::turso_ext::ResultCode {
             if file_ptr.is_null() {
-                return -1;
+                return ::turso_ext::ResultCode::Error;
             }
             let vfs_file: &mut ::turso_ext::VfsFileImpl = &mut *(file_ptr as *mut ::turso_ext::VfsFileImpl);
             let file: &mut <#struct_name as ::turso_ext::VfsExtension>::File =
                 &mut *(vfs_file.file as *mut <#struct_name as ::turso_ext::VfsExtension>::File);
             if <#struct_name as ::turso_ext::VfsExtension>::File::truncate(file, len).is_err() {
-                return -1;
+                return ::turso_ext::ResultCode::Error;
             }
-            0
+            ::turso_ext::ResultCode::OK
         }
 
         #[no_mangle]