diff --git a/configs/qemu_s390x_defconfig b/configs/qemu_s390x_defconfig
index ee18bdb011..4853cd0897 100644
--- a/configs/qemu_s390x_defconfig
+++ b/configs/qemu_s390x_defconfig
@@ -9,6 +9,7 @@ BR2_SYSTEM_DHCP="eth0"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="$(BR2_DEFCONFIG)"
 BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
 # BR2_TARGET_ROOTFS_TAR is not set
 
 # Linux headers same as kernel