diff --git a/board/renesas/grpeach/grpeach.c b/board/renesas/grpeach/grpeach.c
index ac989eb..199ec4a 100644
--- a/board/renesas/grpeach/grpeach.c
+++ b/board/renesas/grpeach/grpeach.c
@@ -40,7 +40,7 @@
 	return 0;
 }
 
-void reset_cpu(ulong addr)
+void reset_cpu(void)
 {
 	/* Dummy read (must read WRCSR:WOVF at least once before clearing) */
 	readb(RZA1_WDT_BASE + WRCSR);