diff --git a/sys/dev/ath/ath_hal/ah.h b/sys/dev/ath/ath_hal/ah.h
index ca2e7ca172ac..0deb9c9a980d 100644
--- a/sys/dev/ath/ath_hal/ah.h
+++ b/sys/dev/ath/ath_hal/ah.h
@@ -1527,11 +1527,13 @@ struct ath_hal {
 	    			struct ath_desc *, u_int);
 	void	  __ahdecl(*ah_set11nAggrLast)(struct ath_hal *,
 				struct ath_desc *);
-
 	void	  __ahdecl(*ah_clr11nAggr)(struct ath_hal *,
 	    			struct ath_desc *);
 	void	  __ahdecl(*ah_set11nBurstDuration)(struct ath_hal *,
 	    			struct ath_desc *, u_int);
+	void	  __ahdecl(*ah_set11nVirtMoreFrag)(struct ath_hal *,
+				struct ath_desc *, u_int);
+
 	HAL_BOOL  __ahdecl(*ah_getMibCycleCounts) (struct ath_hal *,
 				HAL_SURVEY_SAMPLE *);
 
diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416.h b/sys/dev/ath/ath_hal/ar5416/ar5416.h
index 98dcf5e0854b..c5ff6ae7a5e2 100644
--- a/sys/dev/ath/ath_hal/ar5416/ar5416.h
+++ b/sys/dev/ath/ath_hal/ar5416/ar5416.h
@@ -409,8 +409,9 @@ extern void ar5416Set11nAggrFirst(struct ath_hal *ah, struct ath_desc *ds,
 		u_int aggrLen, u_int numDelims);
 extern	void ar5416Set11nAggrMiddle(struct ath_hal *ah, struct ath_desc *ds, u_int numDelims);
 extern void ar5416Set11nAggrLast(struct ath_hal *ah, struct ath_desc *ds);
-
 extern	void ar5416Clr11nAggr(struct ath_hal *ah, struct ath_desc *ds);
+extern	void ar5416Set11nVirtualMoreFrag(struct ath_hal *ah,
+		struct ath_desc *ds, u_int vmf);
 
 extern	void ar5416Set11nBurstDuration(struct ath_hal *ah, struct ath_desc *ds, u_int burstDuration);
 
diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c b/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c
index 9a0a4794ecd4..fd00ea7c7b75 100644
--- a/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c
+++ b/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c
@@ -194,6 +194,7 @@ ar5416InitState(struct ath_hal_5416 *ahp5416, uint16_t devid, HAL_SOFTC sc,
 	ah->ah_set11nMac2040		= ar5416Set11nMac2040;
 	ah->ah_get11nRxClear		= ar5416Get11nRxClear;
 	ah->ah_set11nRxClear		= ar5416Set11nRxClear;
+	ah->ah_set11nVirtMoreFrag	= ar5416Set11nVirtualMoreFrag;
 
 	/* Interrupt functions */
 	ah->ah_isInterruptPending	= ar5416IsInterruptPending;
diff --git a/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c b/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c
index 118a43bcc497..f6711753f298 100644
--- a/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c
+++ b/sys/dev/ath/ath_hal/ar5416/ar5416_xmit.c
@@ -825,6 +825,17 @@ ar5416Clr11nAggr(struct ath_hal *ah, struct ath_desc *ds)
 	ads->ds_ctl6 &= ~AR_AggrLen;
 }
 
+void
+ar5416Set11nVirtualMoreFrag(struct ath_hal *ah, struct ath_desc *ds,
+    u_int vmf)
+{
+	struct ar5416_desc *ads = AR5416DESC(ds);
+	if (vmf)
+		ads->ds_ctl0 |= AR_VirtMoreFrag;
+	else
+		ads->ds_ctl0 &= ~AR_VirtMoreFrag;
+}
+
 /*
  * Program the burst duration, with the included BA delta if it's
  * applicable.
diff --git a/sys/dev/ath/if_athvar.h b/sys/dev/ath/if_athvar.h
index 42442de7a60e..06cffb6829be 100644
--- a/sys/dev/ath/if_athvar.h
+++ b/sys/dev/ath/if_athvar.h
@@ -1297,6 +1297,8 @@ void	ath_intr(void *);
 	((*(_ah)->ah_set11nBurstDuration)((_ah), (_ds), (_dur)))
 #define	ath_hal_clr11n_aggr(_ah, _ds) \
 	((*(_ah)->ah_clr11nAggr)((_ah), (_ds)))
+#define	ath_hal_set11n_virtmorefrag(_ah, _ds, _v) \
+	((*(_ah)->ah_set11nVirtMoreFrag)((_ah), (_ds), (_v)))
 
 #define	ath_hal_gpioCfgOutput(_ah, _gpio, _type) \
 	((*(_ah)->ah_gpioCfgOutput)((_ah), (_gpio), (_type)))