diff --git a/arch/ia64/configs/sn2_defconfig b/arch/ia64/configs/sn2_defconfig
index 6ff7107..a01bb02 100644
--- a/arch/ia64/configs/sn2_defconfig
+++ b/arch/ia64/configs/sn2_defconfig
@@ -588,6 +588,7 @@
 CONFIG_SERIAL_CORE=y
 CONFIG_SERIAL_CORE_CONSOLE=y
 CONFIG_SERIAL_SGI_L1_CONSOLE=y
+CONFIG_SERIAL_SGI_IOC4=y
 CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
@@ -788,6 +789,11 @@
 # CONFIG_INFINIBAND_IPOIB_DEBUG is not set
 
 #
+# SN Devices
+#
+CONFIG_SGI_IOC4=y
+
+#
 # File systems
 #
 CONFIG_EXT2_FS=y