diff --git a/drivers/net/wireless/ath/ath9k/htc.h b/drivers/net/wireless/ath/ath9k/htc.h
index 75ecf6a30d25c6ac68d346c5ac862a0255ba4be1..db00289103fcb34ce79bfcee65afe257ab5e6e31 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -368,7 +368,7 @@ struct ath9k_htc_priv {
 	u16 seq_no;
 	u32 bmiss_cnt;
 
-	struct ath9k_hw_cal_data caldata[38];
+	struct ath9k_hw_cal_data caldata[ATH9K_NUM_CHANNELS];
 
 	spinlock_t beacon_lock;