diff --git a/sys/dev/dc/if_dc.c b/sys/dev/dc/if_dc.c
index b3394b91ed4..d4cba448cd5 100644
--- a/sys/dev/dc/if_dc.c
+++ b/sys/dev/dc/if_dc.c
@@ -2147,9 +2147,9 @@ dc_attach(device_t dev)
 	}
 
 	/* Allocate a busdma tag for mbufs. */
-	error = bus_dma_tag_create(NULL, PAGE_SIZE, 0, BUS_SPACE_MAXADDR_32BIT,
-	    BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES * DC_TX_LIST_CNT,
-	    DC_TX_LIST_CNT, MCLBYTES, 0, NULL, NULL, &sc->dc_mtag);
+	error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
+	    BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES DC_TX_LIST_CNT, MCLBYTES,
+	    0, NULL, NULL, &sc->dc_mtag);
 	if (error) {
 		printf("dc%d: failed to allocate busdma tag\n", unit);
 		error = ENXIO;
diff --git a/sys/pci/if_dc.c b/sys/pci/if_dc.c
index b3394b91ed4..d4cba448cd5 100644
--- a/sys/pci/if_dc.c
+++ b/sys/pci/if_dc.c
@@ -2147,9 +2147,9 @@ dc_attach(device_t dev)
 	}
 
 	/* Allocate a busdma tag for mbufs. */
-	error = bus_dma_tag_create(NULL, PAGE_SIZE, 0, BUS_SPACE_MAXADDR_32BIT,
-	    BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES * DC_TX_LIST_CNT,
-	    DC_TX_LIST_CNT, MCLBYTES, 0, NULL, NULL, &sc->dc_mtag);
+	error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT,
+	    BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES DC_TX_LIST_CNT, MCLBYTES,
+	    0, NULL, NULL, &sc->dc_mtag);
 	if (error) {
 		printf("dc%d: failed to allocate busdma tag\n", unit);
 		error = ENXIO;