diff --git a/script/config/microvm_image/kernel_config_4.19_x86_64 b/script/config/microvm_image/kernel_config_4.19_x86_64
index 6ec1789133c1c8014e325ce7ecdd4df7f707d58c..d1986d70c25aac1e216e716ee3781fceb6ab3164 100644
--- a/script/config/microvm_image/kernel_config_4.19_x86_64
+++ b/script/config/microvm_image/kernel_config_4.19_x86_64
@@ -653,6 +653,7 @@ CONFIG_MEMORY_HOTPLUG_SPARSE=y
 # CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE is not set
 # CONFIG_MEMORY_HOTREMOVE is not set
 CONFIG_SPLIT_PTLOCK_CPUS=4
+CONFIG_MEMORY_BALLOON=y
 CONFIG_COMPACTION=y
 CONFIG_MIGRATION=y
 CONFIG_PHYS_ADDR_T_64BIT=y
@@ -1528,7 +1529,7 @@ CONFIG_AUXDISPLAY=y
 CONFIG_VIRT_DRIVERS=y
 CONFIG_VIRTIO=y
 CONFIG_VIRTIO_MENU=y
-# CONFIG_VIRTIO_BALLOON is not set
+CONFIG_VIRTIO_BALLOON=y
 # CONFIG_VIRTIO_INPUT is not set
 CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y