diff --git a/scheme/debug.rs b/scheme/debug.rs
index 8abb059..43882ae 100644
--- a/scheme/debug.rs
+++ b/scheme/debug.rs
@@ -5,7 +5,7 @@ use super::Scheme;
 pub struct DebugScheme;
 
 impl Scheme for DebugScheme {
-    fn open(&mut self, path: &[u8], flags: usize) -> Result<usize> {
+    fn open(&mut self, path: &[u8], _flags: usize) -> Result<usize> {
         println!("DebugScheme::open: {}", unsafe { str::from_utf8_unchecked(path) });
         Ok(0)
     }
@@ -13,21 +13,21 @@ impl Scheme for DebugScheme {
     /// Read the file `number` into the `buffer`
     ///
     /// Returns the number of bytes read
-    fn read(&mut self, file: usize, buffer: &mut [u8]) -> Result<usize> {
+    fn read(&mut self, _file: usize, _buffer: &mut [u8]) -> Result<usize> {
         Ok(0)
     }
 
     /// Write the `buffer` to the `file`
     ///
     /// Returns the number of bytes written
-    fn write(&mut self, file: usize, buffer: &[u8]) -> Result<usize> {
+    fn write(&mut self, _file: usize, buffer: &[u8]) -> Result<usize> {
         //TODO: Write bytes, do not convert to str
         print!("{}", unsafe { str::from_utf8_unchecked(buffer) });
         Ok(buffer.len())
     }
 
     /// Close the file `number`
-    fn close(&mut self, file: usize) -> Result<()> {
+    fn close(&mut self, _file: usize) -> Result<()> {
         Ok(())
     }
 }
diff --git a/syscall/mod.rs b/syscall/mod.rs
index 2107d4f..1cf0f58 100644
--- a/syscall/mod.rs
+++ b/syscall/mod.rs
@@ -92,7 +92,7 @@ pub fn convert_slice_mut<T>(ptr: *mut T, len: usize) -> Result<&'static mut [T]>
     Ok(unsafe { slice::from_raw_parts_mut(ptr, len) })
 }
 
-pub fn handle(a: usize, b: usize, c: usize, d: usize, e: usize, f: usize) -> ::core::result::Result<usize, usize> {
+pub fn handle(a: usize, b: usize, c: usize, d: usize, e: usize, _f: usize) -> ::core::result::Result<usize, usize> {
     match Call::from(a) {
         Call::Exit => exit(b),
         Call::Read => read(b, convert_slice_mut(c as *mut u8, d)?),