diff --git a/configs/pc_x86_64_bios_defconfig b/configs/pc_x86_64_bios_defconfig
index 23462ad563..65b0016031 100644
--- a/configs/pc_x86_64_bios_defconfig
+++ b/configs/pc_x86_64_bios_defconfig
@@ -17,6 +17,7 @@ BR2_TARGET_GRUB2=y
 # Filesystem / image
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_BLOCKS=120000
 # BR2_TARGET_ROOTFS_TAR is not set
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/pc/post-image.sh"