diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
index fcee95d772649..e81319dbe7fd5 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
@@ -1691,8 +1691,6 @@ void rt2800_config_erp(struct rt2x00_dev *rt2x00dev, struct rt2x00lib_erp *erp,
 
 	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 		rt2800_register_read(rt2x00dev, AUTO_RSP_CFG, &reg);
-		rt2x00_set_field32(&reg, AUTO_RSP_CFG_BAC_ACK_POLICY,
-				   !!erp->short_preamble);
 		rt2x00_set_field32(&reg, AUTO_RSP_CFG_AR_PREAMBLE,
 				   !!erp->short_preamble);
 		rt2800_register_write(rt2x00dev, AUTO_RSP_CFG, reg);
@@ -4735,9 +4733,9 @@ static int rt2800_init_registers(struct rt2x00_dev *rt2x00dev)
 	rt2800_register_read(rt2x00dev, AUTO_RSP_CFG, &reg);
 	rt2x00_set_field32(&reg, AUTO_RSP_CFG_AUTORESPONDER, 1);
 	rt2x00_set_field32(&reg, AUTO_RSP_CFG_BAC_ACK_POLICY, 1);
-	rt2x00_set_field32(&reg, AUTO_RSP_CFG_CTS_40_MMODE, 0);
+	rt2x00_set_field32(&reg, AUTO_RSP_CFG_CTS_40_MMODE, 1);
 	rt2x00_set_field32(&reg, AUTO_RSP_CFG_CTS_40_MREF, 0);
-	rt2x00_set_field32(&reg, AUTO_RSP_CFG_AR_PREAMBLE, 1);
+	rt2x00_set_field32(&reg, AUTO_RSP_CFG_AR_PREAMBLE, 0);
 	rt2x00_set_field32(&reg, AUTO_RSP_CFG_DUAL_CTS_EN, 0);
 	rt2x00_set_field32(&reg, AUTO_RSP_CFG_ACK_CTS_PSM_BIT, 0);
 	rt2800_register_write(rt2x00dev, AUTO_RSP_CFG, reg);