diff --git a/buildconfigs/linux-defconfig_xen_x86_32 b/buildconfigs/linux-defconfig_xen_x86_32
index 328b86d938..8a793de380 100644
--- a/buildconfigs/linux-defconfig_xen_x86_32
+++ b/buildconfigs/linux-defconfig_xen_x86_32
@@ -1268,6 +1268,7 @@ CONFIG_IEEE1394_RAWIO=m
 CONFIG_I2O=m
 CONFIG_I2O_LCT_NOTIFY_ON_CHANGES=y
 CONFIG_I2O_EXT_ADAPTEC=y
+CONFIG_I2O_EXT_ADAPTEC_DMA64=y
 CONFIG_I2O_CONFIG=m
 CONFIG_I2O_CONFIG_OLD_IOCTL=y
 CONFIG_I2O_BUS=m