diff --git a/sys/pc98/conf/GENERIC b/sys/pc98/conf/GENERIC
index c6d10d058db..a631d09aab7 100644
--- a/sys/pc98/conf/GENERIC
+++ b/sys/pc98/conf/GENERIC
@@ -218,6 +218,7 @@ device		wi		# WaveLAN/Intersil/Symbol 802.11 wireless NICs.
 # Pseudo devices.
 device		loop		# Network loopback
 device		mem		# Memory and kernel memory devices
+device		io		# I/O device
 device		random		# Entropy device
 device		ether		# Ethernet support
 device		sl		# Kernel SLIP