diff --git a/sys/dev/ahci/ahci.c b/sys/dev/ahci/ahci.c
index 22c9586f5df..a275019ba36 100644
--- a/sys/dev/ahci/ahci.c
+++ b/sys/dev/ahci/ahci.c
@@ -340,6 +340,7 @@ ahci_attach(device_t dev)
 		rman_fini(&ctlr->sc_iomem);
 		return (error);
 	}
+	pci_enable_busmaster(dev);
 	/* Reset controller */
 	if ((error = ahci_ctlr_reset(dev)) != 0) {
 		bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);