diff --git a/sys/dev/aha/aha_isa.c b/sys/dev/aha/aha_isa.c
index b29d370e0d3b..7485563ac68c 100644
--- a/sys/dev/aha/aha_isa.c
+++ b/sys/dev/aha/aha_isa.c
@@ -231,7 +231,7 @@ aha_isa_attach(device_t dev)
 	filter_arg = NULL;
 	lowaddr = BUS_SPACE_MAXADDR_24BIT;
 
-	if (bus_dma_tag_create(	/* parent	*/ NULL,
+	if (bus_dma_tag_create(	/* parent	*/ bus_get_dma_tag(dev),
 				/* alignemnt	*/ 1,
 				/* boundary	*/ 0,
 				/* lowaddr	*/ lowaddr,
diff --git a/sys/dev/aha/aha_mca.c b/sys/dev/aha/aha_mca.c
index 75a930bdc407..f09a7a46f5ef 100644
--- a/sys/dev/aha/aha_mca.c
+++ b/sys/dev/aha/aha_mca.c
@@ -162,7 +162,7 @@ aha_mca_attach (device_t dev)
 	isa_dmacascade(rman_get_start(sc->drq));
 
 	error = bus_dma_tag_create(
-				/* parent	*/ NULL,
+				/* parent	*/ bus_get_dma_tag(dev),
 				/* alignemnt	*/ 1,
 				/* boundary	*/ 0,
 				/* lowaddr	*/ BUS_SPACE_MAXADDR_24BIT,