diff --git a/drivers/net/wireless/rtl8180_sa2400.c b/drivers/net/wireless/rtl8180_sa2400.c
index e08ace7..0311b4e 100644
--- a/drivers/net/wireless/rtl8180_sa2400.c
+++ b/drivers/net/wireless/rtl8180_sa2400.c
@@ -80,8 +80,9 @@
 				  struct ieee80211_conf *conf)
 {
 	struct rtl8180_priv *priv = dev->priv;
-	u32 txpw = priv->channels[conf->channel - 1].val & 0xFF;
-	u32 chan = sa2400_chan[conf->channel - 1];
+	int channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
+	u32 txpw = priv->channels[channel - 1].hw_value & 0xFF;
+	u32 chan = sa2400_chan[channel - 1];
 
 	write_sa2400(dev, 7, txpw);