diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416_ani.c b/sys/dev/ath/ath_hal/ar5416/ar5416_ani.c
index 0ea3034ed37d..3a8f7859b43f 100644
--- a/sys/dev/ath/ath_hal/ar5416/ar5416_ani.c
+++ b/sys/dev/ath/ath_hal/ar5416/ar5416_ani.c
@@ -296,6 +296,12 @@ ar5416AniControl(struct ath_hal *ah, HAL_ANI_CMD cmd, int param)
 		}
 		OS_REG_RMW_FIELD(ah, AR_PHY_TIMING5,
 		    AR_PHY_TIMING5_CYCPWR_THR1, params->cycPwrThr1[level]);
+
+		/* Only set the ext channel cycpwr_thr1 field for ht/40 */
+		if (IEEE80211_IS_CHAN_HT40(AH_PRIVATE(ah)->ah_curchan))
+			OS_REG_RMW_FIELD(ah, AR_PHY_EXT_CCA,
+			    AR_PHY_EXT_TIMING5_CYCPWR_THR1, params->cycPwrThr1[level]);
+
 		if (level > aniState->spurImmunityLevel)
 			ahp->ah_stats.ast_ani_spurup++;
 		else if (level < aniState->spurImmunityLevel)
diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416phy.h b/sys/dev/ath/ath_hal/ar5416/ar5416phy.h
index efe509f2c85a..fc02886b9d6a 100644
--- a/sys/dev/ath/ath_hal/ar5416/ar5416phy.h
+++ b/sys/dev/ath/ath_hal/ar5416/ar5416phy.h
@@ -100,6 +100,13 @@
 #define AR_PHY_EXT_MINCCA_PWR_S 23
 #define AR_PHY_EXT_CCA_THRESH62	0x007F0000
 #define AR_PHY_EXT_CCA_THRESH62_S	16
+/*
+ * This duplicates AR_PHY_EXT_CCA_CYCPWR_THR1; it reads more like
+ * an ANI register this way.
+ */
+#define	AR_PHY_EXT_TIMING5_CYCPWR_THR1		0x0000FE00
+#define	AR_PHY_EXT_TIMING5_CYCPWR_THR1_S	9
+
 #define AR9280_PHY_EXT_MINCCA_PWR       0x01FF0000
 #define AR9280_PHY_EXT_MINCCA_PWR_S     16