diff --git a/kernel/include/kernel/Scheduler.h b/kernel/include/kernel/Scheduler.h
index 42a4ffd6d..1b4a8fa68 100644
--- a/kernel/include/kernel/Scheduler.h
+++ b/kernel/include/kernel/Scheduler.h
@@ -31,6 +31,8 @@ namespace Kernel
 		Thread& current_thread();
 		static pid_t current_tid();
 
+		static bool is_valid_tid(pid_t tid);
+
 	private:
 		Scheduler() = default;
 
diff --git a/kernel/kernel/Scheduler.cpp b/kernel/kernel/Scheduler.cpp
index a815fe809..a65ad08be 100644
--- a/kernel/kernel/Scheduler.cpp
+++ b/kernel/kernel/Scheduler.cpp
@@ -373,4 +373,26 @@ namespace Kernel
 		}
 	}
 
+	bool Scheduler::is_valid_tid(pid_t tid)
+	{
+		CriticalScope _;
+
+		if (s_instance == nullptr)
+			return tid == 0;
+
+		for (auto& thread : s_instance->m_active_threads)
+			if (thread.thread->tid() == tid)
+				return true;
+		
+		for (auto& thread : s_instance->m_sleeping_threads)
+			if (thread.thread->tid() == tid)
+				return true;
+
+		for (auto& thread : s_instance->m_blocking_threads)
+			if (thread.thread->tid() == tid)
+				return true;
+
+		return false;
+	}
+
 }
\ No newline at end of file