diff --git a/core/io/io_uring.rs b/core/io/io_uring.rs
index c9cfaaa9b..e745bb168 100644
--- a/core/io/io_uring.rs
+++ b/core/io/io_uring.rs
@@ -535,13 +535,9 @@ impl IO for UringIO {
             "fixed buffer length must be logical block aligned"
         );
         let mut inner = self.inner.borrow_mut();
-        let slot = inner
-            .free_arenas
-            .iter()
-            .position(|e| e.is_none())
-            .ok_or_else(|| {
-                crate::error::CompletionError::UringIOError("no free fixed buffer slots")
-            })?;
+        let slot = inner.free_arenas.iter().position(|e| e.is_none()).ok_or(
+            crate::error::CompletionError::UringIOError("no free fixed buffer slots"),
+        )?;
         unsafe {
             inner.ring.ring.submitter().register_buffers_update(
                 slot as u32,
diff --git a/core/io/windows.rs b/core/io/windows.rs
index dcc42474f..9f5cb96bd 100644
--- a/core/io/windows.rs
+++ b/core/io/windows.rs
@@ -1,4 +1,3 @@
-use super::MemoryIO;
 use crate::{Clock, Completion, File, Instant, LimboError, OpenFlags, Result, IO};
 use parking_lot::RwLock;
 use std::io::{Read, Seek, Write};
@@ -90,7 +89,7 @@ impl File for WindowsFile {
     #[instrument(err, skip_all, level = Level::TRACE)]
     fn sync(&self, c: Completion) -> Result<Completion> {
         let file = self.file.write();
-        file.sync_all().map_err(LimboError::IOError)?;
+        file.sync_all()?;
         c.complete(0);
         Ok(c)
     }
@@ -98,7 +97,7 @@ impl File for WindowsFile {
     #[instrument(err, skip_all, level = Level::TRACE)]
     fn truncate(&self, len: usize, c: Completion) -> Result<Completion> {
         let file = self.file.write();
-        file.set_len(len as u64).map_err(LimboError::IOError)?;
+        file.set_len(len as u64)?;
         c.complete(0);
         Ok(c)
     }
diff --git a/core/lib.rs b/core/lib.rs
index b1e92cc03..c7226818f 100644
--- a/core/lib.rs
+++ b/core/lib.rs
@@ -1309,9 +1309,9 @@ impl Connection {
             Ok(result) => result,
             // on windows, zero read will trigger UnexpectedEof
             #[cfg(target_os = "windows")]
-            Err(LimboError::IOError(e)) if e.kind() == std::io::ErrorKind::UnexpectedEof => {
-                return Ok(false)
-            }
+            Err(LimboError::CompletionError(CompletionError::IOError(
+                std::io::ErrorKind::UnexpectedEof,
+            ))) => return Ok(false),
             Err(err) => return Err(err),
         };