diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c
index 15e672d7150e8adf70b409bb2e06bff89651030b..a5b93a30c6eb21142037d7db38ef9cd7fc608c9d 100644
--- a/arch/nios2/kernel/signal.c
+++ b/arch/nios2/kernel/signal.c
@@ -264,6 +264,7 @@ static int do_signal(struct pt_regs *regs)
 			regs->ea = restart_addr;
 			break;
 		}
+		regs->orig_r2 = -1;
 	}
 
 	if (get_signal(&ksig)) {