diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -251,7 +251,7 @@
 device		iavf			# Intel Adaptive Virtual Function
 device		ice			# Intel 800 Series Physical Function
 device		vmx			# VMware VMXNET3 Ethernet
-device		axp			# AMD EPYC integrated NIC
+device		axp			# AMD EPYC integrated NIC (requires miibus)
 
 # PCI Ethernet NICs.
 device		bxe			# Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
diff --git a/sys/amd64/conf/NOTES b/sys/amd64/conf/NOTES
--- a/sys/amd64/conf/NOTES
+++ b/sys/amd64/conf/NOTES
@@ -309,6 +309,8 @@
 # vmx:	VMware VMXNET3 Ethernet (BSD open source)
 # wpi:	Intel 3945ABG Wireless LAN controller
 #	Requires the wpi firmware module
+# axp: AMD EPYC integrated NIC
+#   Requires the miibus module
 
 device		bxe		# Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
 options 	ED_3C503