#ifdef MAGPIE_MERLIN
-void ar5416Set11nRateScenario_20(struct ath_hal *ah, struct ath_tx_desc *ds,
+void ar5416Set11nRateScenario_20(struct ath_tx_desc *ds,
a_uint32_t durUpdateEn, a_uint32_t rtsctsRate,
a_uint32_t rtsctsDuration,
HAL_11N_RATE_SERIES series[], a_uint32_t nseries,
#else
-void ar5416Set11nRateScenario_20(struct ath_hal *ah, struct ath_tx_desc *ds,
+void ar5416Set11nRateScenario_20(struct ath_tx_desc *ds,
a_uint32_t durUpdateEn, a_uint32_t rtsctsRate,
a_uint32_t rtsctsDuration,
HAL_11N_RATE_SERIES series[], a_uint32_t nseries,