diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c
index bcc0790b9151..bfb20821a8f4 100644
--- a/arch/nios2/kernel/signal.c
+++ b/arch/nios2/kernel/signal.c
@@ -261,6 +261,7 @@ static int do_signal(struct pt_regs *regs)
 			regs->ea = restart_addr;
 			break;
 		}
+		regs->orig_r2 = -1;
 	}
 
 	if (get_signal(&ksig)) {