diff --git a/drivers/staging/comedi/drivers/ni_at_ao.c b/drivers/staging/comedi/drivers/ni_at_ao.c
index 4e4b227e091f9cb108bc2dc6215f8839f8628a4a..3545d294c4ae16907689b091a0a2d208fc0a4be3 100644
--- a/drivers/staging/comedi/drivers/ni_at_ao.c
+++ b/drivers/staging/comedi/drivers/ni_at_ao.c
@@ -110,7 +110,7 @@ Configuration options:
 #define BCD		0x01
 
 #define ATAO_2_RTSISHFT		0x06	/* W 8 */
-#define RSI		0x01
+#define ATAO_RTSISHFT_RSI	(1 << 0)
 
 #define ATAO_2_RTSISTRB		0x07	/* W 8 */