diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c
index d5000d494699b61b27f04e7470503219524b994f..916180e4a9978190c3399a2eb62d87262c00fb26 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)) {