diff --git a/sys/dev/ahci/ahci.c b/sys/dev/ahci/ahci.c
index b1f9c85141bb..b8cca377e47f 100644
--- a/sys/dev/ahci/ahci.c
+++ b/sys/dev/ahci/ahci.c
@@ -765,7 +765,7 @@ static int
 ahci_ch_probe(device_t dev)
 {
 
-	device_set_desc_copy(dev, "AHCI channel");
+	device_set_desc(dev, "AHCI channel");
 	return (BUS_PROBE_DEFAULT);
 }
 
diff --git a/sys/dev/ahci/ahci_generic.c b/sys/dev/ahci/ahci_generic.c
index 90487b4622eb..2d4babb17645 100644
--- a/sys/dev/ahci/ahci_generic.c
+++ b/sys/dev/ahci/ahci_generic.c
@@ -76,7 +76,7 @@ ahci_fdt_probe(device_t dev)
 	if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
 		return (ENXIO);
 
-	device_set_desc_copy(dev, "AHCI SATA controller");
+	device_set_desc(dev, "AHCI SATA controller");
 	node = ofw_bus_get_node(dev);
 	ctlr->dma_coherent = OF_hasprop(node, "dma-coherent");
 	return (BUS_PROBE_DEFAULT);
@@ -107,7 +107,7 @@ ahci_acpi_probe(device_t dev)
 	if (pci_get_class(dev) == PCIC_STORAGE &&
 	    pci_get_subclass(dev) == PCIS_STORAGE_SATA &&
 	    pci_get_progif(dev) == PCIP_STORAGE_SATA_AHCI_1_0) {
-		device_set_desc_copy(dev, "AHCI SATA controller");
+		device_set_desc(dev, "AHCI SATA controller");
 		if (ACPI_FAILURE(acpi_GetInteger(h, "_CCA",
 		      &ctlr->dma_coherent)))
 			ctlr->dma_coherent = 0;
diff --git a/sys/dev/ahci/ahci_pci.c b/sys/dev/ahci/ahci_pci.c
index 7cc3ce18c8ae..69587da2226a 100644
--- a/sys/dev/ahci/ahci_pci.c
+++ b/sys/dev/ahci/ahci_pci.c
@@ -399,7 +399,6 @@ ahci_pci_ctlr_reset(device_t dev)
 static int
 ahci_probe(device_t dev)
 {
-	char buf[64];
 	int i, valid = 0;
 	uint32_t devid = pci_get_devid(dev);
 	uint8_t revid = pci_get_revid(dev);
@@ -430,22 +429,20 @@ ahci_probe(device_t dev)
 			    (ahci_ids[i].quirks & AHCI_Q_NOFORCE) &&
 			    (pci_read_config(dev, 0xdf, 1) & 0x40) == 0)
 				return (ENXIO);
-			snprintf(buf, sizeof(buf), "%s AHCI SATA controller",
+			device_set_descf(dev, "%s AHCI SATA controller",
 			    ahci_ids[i].name);
-			device_set_desc_copy(dev, buf);
 			return (BUS_PROBE_DEFAULT);
 		}
 	}
 	if (valid != 1)
 		return (ENXIO);
-	device_set_desc_copy(dev, "AHCI SATA controller");
+	device_set_desc(dev, "AHCI SATA controller");
 	return (BUS_PROBE_DEFAULT);
 }
 
 static int
 ahci_ata_probe(device_t dev)
 {
-	char buf[64];
 	int i;
 	uint32_t devid = pci_get_devid(dev);
 	uint8_t revid = pci_get_revid(dev);
@@ -456,13 +453,12 @@ ahci_ata_probe(device_t dev)
 	for (i = 0; ahci_ids[i].id != 0; i++) {
 		if (ahci_ids[i].id == devid &&
 		    ahci_ids[i].rev <= revid) {
-			snprintf(buf, sizeof(buf), "%s AHCI SATA controller",
+			device_set_descf(dev, "%s AHCI SATA controller",
 			    ahci_ids[i].name);
-			device_set_desc_copy(dev, buf);
 			return (BUS_PROBE_DEFAULT);
 		}
 	}
-	device_set_desc_copy(dev, "AHCI SATA controller");
+	device_set_desc(dev, "AHCI SATA controller");
 	return (BUS_PROBE_DEFAULT);
 }
 
diff --git a/sys/dev/ahci/ahciem.c b/sys/dev/ahci/ahciem.c
index 8b941a73a4e0..97963784b561 100644
--- a/sys/dev/ahci/ahciem.c
+++ b/sys/dev/ahci/ahciem.c
@@ -63,7 +63,7 @@ static int
 ahci_em_probe(device_t dev)
 {
 
-	device_set_desc_copy(dev, "AHCI enclosure management bridge");
+	device_set_desc(dev, "AHCI enclosure management bridge");
 	return (BUS_PROBE_DEFAULT);
 }