diff --git a/src/kernel/exception.rs b/src/kernel/exception.rs
index a396718..c260d3c 100644
--- a/src/kernel/exception.rs
+++ b/src/kernel/exception.rs
@@ -197,6 +197,11 @@ fn syscall(machine: &mut Machine, system: &mut System) -> Result<MachineOk, Mach
     }
 }
 
+fn sc_lock_release(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError>{
+    let id = machine.read_int_register(10) as i32;
+    system.get_thread_manager().lock_release(id, machine)
+}
+
 fn sc_lock_acquire(machine: &mut Machine, system: &mut System) -> Result<MachineOk, MachineError> {
     let id = machine.read_int_register(10) as i32;
     system.get_thread_manager().lock_acquire(id, machine)
diff --git a/src/kernel/thread_manager.rs b/src/kernel/thread_manager.rs
index 870a9fc..26911b8 100644
--- a/src/kernel/thread_manager.rs
+++ b/src/kernel/thread_manager.rs
@@ -282,6 +282,10 @@ impl ThreadManager {
         }
     }
 
+    pub fn lock_release(&mut self, id: i32, machine: &mut Machine) -> Result<MachineOk, MachineError>{
+        todo!()
+    }
+
     /// Currently running thread
     pub fn get_g_current_thread(&mut self) -> &Option<Rc<RefCell<Thread>>> {
         &self.g_current_thread