diff --git a/Kernel/Arch/aarch64/RegisterState.h b/Kernel/Arch/aarch64/RegisterState.h
index e7a1502084..6aa6e4452f 100644
--- a/Kernel/Arch/aarch64/RegisterState.h
+++ b/Kernel/Arch/aarch64/RegisterState.h
@@ -49,6 +49,13 @@ inline void copy_kernel_registers_into_ptrace_registers(PtraceRegisters& ptrace_
     TODO_AARCH64();
 }
 
+inline void copy_ptrace_registers_into_kernel_registers(RegisterState& kernel_regs, PtraceRegisters const& ptrace_regs)
+{
+    (void)kernel_regs;
+    (void)ptrace_regs;
+    TODO_AARCH64();
+}
+
 struct DebugRegisterState {
 };