diff --git a/sys/amd64/conf/NOTES b/sys/amd64/conf/NOTES
index a4371f78f61..7a414642ef3 100644
--- a/sys/amd64/conf/NOTES
+++ b/sys/amd64/conf/NOTES
@@ -442,6 +442,13 @@ options 	SAFE_RNDTEST	# enable rndtest support
 
 #
 # VirtIO support
+#
+# The virtio entry provides a generic bus for use by the device drivers.
+# It must be combined with an interface that communicates with the host.
+# Multiple such interfaces defined by the VirtIO specification. FreeBSD
+# only has support for PCI. Therefore, virtio_pci must be statically
+# compiled in or loaded as a module for the device drivers to function.
+#
 device		virtio		# Generic VirtIO bus (required)
 device		virtio_pci	# VirtIO PCI Interface
 device		vtnet		# VirtIO Ethernet device
diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64
index 131a1e76bc5..5e659b95ebd 100644
--- a/sys/conf/files.amd64
+++ b/sys/conf/files.amd64
@@ -393,11 +393,11 @@ dev/virtio/virtio.c			optional	virtio
 dev/virtio/virtqueue.c			optional	virtio
 dev/virtio/virtio_bus_if.m		optional	virtio
 dev/virtio/virtio_if.m			optional	virtio
-dev/virtio/pci/virtio_pci.c		optional	virtio_pci virtio pci
-dev/virtio/network/if_vtnet.c		optional	vtnet virtio
-dev/virtio/block/virtio_blk.c		optional	virtio_blk virtio
-dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon virtio
-dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi virtio scbus
+dev/virtio/pci/virtio_pci.c		optional	virtio_pci
+dev/virtio/network/if_vtnet.c		optional	vtnet
+dev/virtio/block/virtio_blk.c		optional	virtio_blk
+dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon
+dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi
 isa/syscons_isa.c		optional	sc
 isa/vga_isa.c			optional	vga
 kern/kern_clocksource.c		standard
diff --git a/sys/conf/files.i386 b/sys/conf/files.i386
index fd536af0994..f4c595ad8fe 100644
--- a/sys/conf/files.i386
+++ b/sys/conf/files.i386
@@ -374,11 +374,11 @@ dev/virtio/virtio.c			optional	virtio
 dev/virtio/virtqueue.c			optional	virtio
 dev/virtio/virtio_bus_if.m		optional	virtio
 dev/virtio/virtio_if.m			optional	virtio
-dev/virtio/pci/virtio_pci.c		optional	virtio_pci virtio pci
-dev/virtio/network/if_vtnet.c		optional	vtnet virtio
-dev/virtio/block/virtio_blk.c		optional	virtio_blk virtio
-dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon virtio
-dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi virtio scbus
+dev/virtio/pci/virtio_pci.c		optional	virtio_pci
+dev/virtio/network/if_vtnet.c		optional	vtnet
+dev/virtio/block/virtio_blk.c		optional	virtio_blk
+dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon
+dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi
 i386/acpica/acpi_machdep.c	optional acpi
 acpi_wakecode.o			optional acpi				\
 	dependency	"$S/i386/acpica/acpi_wakecode.S assym.s"	\
diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES
index 95ccd4ef9c0..f8f78ccd1a8 100644
--- a/sys/i386/conf/NOTES
+++ b/sys/i386/conf/NOTES
@@ -773,6 +773,13 @@ device		glxsb		# AMD Geode LX Security Block
 
 #
 # VirtIO support
+#
+# The virtio entry provides a generic bus for use by the device drivers.
+# It must be combined with an interface that communicates with the host.
+# Multiple such interfaces defined by the VirtIO specification. FreeBSD
+# only has support for PCI. Therefore, virtio_pci must be statically
+# compiled in or loaded as a module for the device drivers to function.
+#
 device		virtio		# Generic VirtIO bus (required)
 device		virtio_pci	# VirtIO PCI Interface
 device		vtnet		# VirtIO Ethernet device