diff --git a/buildconfigs/linux-defconfig_xen_x86_32 b/buildconfigs/linux-defconfig_xen_x86_32
index d747034a1b..19a4dc2474 100644
--- a/buildconfigs/linux-defconfig_xen_x86_32
+++ b/buildconfigs/linux-defconfig_xen_x86_32
@@ -3020,7 +3020,7 @@ CONFIG_XEN_PCIDEV_BACKEND=m
 CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
 # CONFIG_XEN_PCIDEV_BACKEND_PASS is not set
 # CONFIG_XEN_PCIDEV_BE_DEBUG is not set
-CONFIG_XEN_BLKDEV_BACKEND=m
+CONFIG_XEN_BLKDEV_BACKEND=y
 # CONFIG_XEN_BLKDEV_TAP_BE is not set
 CONFIG_XEN_NETDEV_BACKEND=y
 # CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER is not set
diff --git a/buildconfigs/linux-defconfig_xen_x86_64 b/buildconfigs/linux-defconfig_xen_x86_64
index 1a8cb9b6e4..a076efff9d 100644
--- a/buildconfigs/linux-defconfig_xen_x86_64
+++ b/buildconfigs/linux-defconfig_xen_x86_64
@@ -2853,7 +2853,7 @@ CONFIG_XEN_PCIDEV_BACKEND=m
 # CONFIG_XEN_PCIDEV_BACKEND_VPCI is not set
 CONFIG_XEN_PCIDEV_BACKEND_PASS=y
 # CONFIG_XEN_PCIDEV_BE_DEBUG is not set
-CONFIG_XEN_BLKDEV_BACKEND=m
+CONFIG_XEN_BLKDEV_BACKEND=y
 # CONFIG_XEN_BLKDEV_TAP_BE is not set
 CONFIG_XEN_NETDEV_BACKEND=y
 # CONFIG_XEN_NETDEV_PIPELINED_TRANSMITTER is not set