diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
index 620821e..efb6a02 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.h
@@ -31,6 +31,12 @@
 #define AR9300_ANT_16S               25
 #define AR9300_FUTURE_MODAL_SZ       6
 
+#define AR9300_PAPRD_RATE_MASK		0x01ffffff
+#define AR9300_PAPRD_SCALE_1		0x0e000000
+#define AR9300_PAPRD_SCALE_1_S		25
+#define AR9300_PAPRD_SCALE_2		0x70000000
+#define AR9300_PAPRD_SCALE_2_S		28
+
 /* Delta from which to start power to pdadc table */
 /* This offset is used in both open loop and closed loop power control
  * schemes. In open loop power control, it is not really needed, but for
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
index 74cff43..cdca4c3 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c
@@ -52,8 +52,8 @@
 	else
 		hdr = &eep->modalHeader2G;
 
-	am_mask = le32_to_cpu(hdr->papdRateMaskHt20);
-	ht40_mask = le32_to_cpu(hdr->papdRateMaskHt40);
+	am_mask = le32_to_cpu(hdr->papdRateMaskHt20) & AR9300_PAPRD_RATE_MASK;
+	ht40_mask = le32_to_cpu(hdr->papdRateMaskHt40) & AR9300_PAPRD_RATE_MASK;
 
 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK, am_mask);
 	REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK, am_mask);