diff --git a/sys/dev/twa/tw_osl.h b/sys/dev/twa/tw_osl.h
index 8927c76aa5fe..50fa722954e7 100644
--- a/sys/dev/twa/tw_osl.h
+++ b/sys/dev/twa/tw_osl.h
@@ -55,12 +55,6 @@
 #define TW_OSLI_MAX_NUM_IOS		(TW_OSLI_MAX_NUM_REQUESTS - 2)
 #define TW_OSLI_MAX_NUM_AENS		0x100
 
-#ifdef PAE
-#define	TW_OSLI_DMA_BOUNDARY		(1u << 31)
-#else
-#define	TW_OSLI_DMA_BOUNDARY		((bus_size_t)((uint64_t)1 << 32))
-#endif
-
 /* Possible values of req->state. */
 #define TW_OSLI_REQ_STATE_INIT		0x0	/* being initialized */
 #define TW_OSLI_REQ_STATE_BUSY		0x1	/* submitted to CL */
diff --git a/sys/dev/twa/tw_osl_freebsd.c b/sys/dev/twa/tw_osl_freebsd.c
index 0d018b68f8ab..aedcfe8f8cd0 100644
--- a/sys/dev/twa/tw_osl_freebsd.c
+++ b/sys/dev/twa/tw_osl_freebsd.c
@@ -562,9 +562,9 @@ tw_osli_alloc_mem(struct twa_softc *sc)
 	}
 
 	/* Create the parent dma tag. */
-	if (bus_dma_tag_create(NULL,			/* parent */
+	if (bus_dma_tag_create(bus_get_dma_tag(sc->bus_dev), /* parent */
 				sc->alignment,		/* alignment */
-				TW_OSLI_DMA_BOUNDARY,	/* boundary */
+				0,			/* boundary */
 				BUS_SPACE_MAXADDR,	/* lowaddr */
 				BUS_SPACE_MAXADDR, 	/* highaddr */
 				NULL, NULL, 		/* filter, filterarg */