diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
index 7103d91..3e876f0 100644
--- a/arch/m32r/kernel/process.c
+++ b/arch/m32r/kernel/process.c
@@ -225,7 +225,7 @@
 	return 0; /* Task didn't use the fpu at all. */
 }
 
-int copy_thread(int nr, unsigned long clone_flags, unsigned long spu,
+int copy_thread(unsigned long clone_flags, unsigned long spu,
 	unsigned long unused, struct task_struct *tsk, struct pt_regs *regs)
 {
 	struct pt_regs *childregs = task_pt_regs(tsk);