diff --git a/Kernel/Thread.h b/Kernel/Thread.h
index eb568a17c74..9733ed9f7be 100644
--- a/Kernel/Thread.h
+++ b/Kernel/Thread.h
@@ -1276,7 +1276,7 @@ private:
     void relock_process(LockMode, u32);
     void reset_fpu_state();
 
-    mutable RecursiveSpinlock m_lock;
+    mutable RecursiveSpinlock m_lock { LockRank::Thread };
     mutable RecursiveSpinlock m_block_lock;
     NonnullRefPtr<Process> m_process;
     ThreadID m_tid { -1 };