diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c
index 92f99a303920..c000c85a3ded 100644
--- a/drivers/net/wireless/realtek/rtlwifi/base.c
+++ b/drivers/net/wireless/realtek/rtlwifi/base.c
@@ -2646,6 +2646,8 @@ EXPORT_SYMBOL_GPL(rtl_global_var);
 
 static int __init rtl_core_module_init(void)
 {
+	BUILD_BUG_ON(TX_PWR_BY_RATE_NUM_RATE < TX_PWR_BY_RATE_NUM_SECTION);
+
 	if (rtl_rate_control_register())
 		pr_err("rtl: Unable to register rtl_rc, use default RC !!\n");
 
diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h b/drivers/net/wireless/realtek/rtlwifi/wifi.h
index 31ef9f72bef1..29c1289ad6b2 100644
--- a/drivers/net/wireless/realtek/rtlwifi/wifi.h
+++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h
@@ -174,6 +174,7 @@ enum rtl8192c_h2c_cmd {
 #define TX_PWR_BY_RATE_NUM_BAND		2
 #define TX_PWR_BY_RATE_NUM_RF		4
 #define TX_PWR_BY_RATE_NUM_SECTION	12
+#define TX_PWR_BY_RATE_NUM_RATE		84 /* >= TX_PWR_BY_RATE_NUM_SECTION */
 #define MAX_BASE_NUM_IN_PHY_REG_PG_24G  6
 #define MAX_BASE_NUM_IN_PHY_REG_PG_5G	5
 
@@ -1286,7 +1287,7 @@ struct rtl_phy {
 	u32 tx_power_by_rate_offset[TX_PWR_BY_RATE_NUM_BAND]
 				   [TX_PWR_BY_RATE_NUM_RF]
 				   [TX_PWR_BY_RATE_NUM_RF]
-				   [TX_PWR_BY_RATE_NUM_SECTION];
+				   [TX_PWR_BY_RATE_NUM_RATE];
 	u8 txpwr_by_rate_base_24g[TX_PWR_BY_RATE_NUM_RF]
 				 [TX_PWR_BY_RATE_NUM_RF]
 				 [MAX_BASE_NUM_IN_PHY_REG_PG_24G];