diff --git a/meta-yocto/conf/machine/atom-pc.conf b/meta-yocto/conf/machine/atom-pc.conf
index 99e34e8445..993cbabd2d 100644
--- a/meta-yocto/conf/machine/atom-pc.conf
+++ b/meta-yocto/conf/machine/atom-pc.conf
@@ -30,8 +30,6 @@ XSERVER ?= "xserver-xf86-dri-lite \
 
 MACHINE_EXTRA_RRECOMMENDS = "kernel-modules eee-acpi-scripts"
 
-IMAGE_ROOTFS_SIZE_ext3 = "500000"
-
 IMAGE_FSTYPES ?= "ext3 cpio.gz"
 
 APPEND += "usbcore.autosuspend=1"
diff --git a/meta-yocto/conf/machine/routerstationpro.conf b/meta-yocto/conf/machine/routerstationpro.conf
index d464842134..71107a6198 100644
--- a/meta-yocto/conf/machine/routerstationpro.conf
+++ b/meta-yocto/conf/machine/routerstationpro.conf
@@ -19,6 +19,5 @@ SERIAL_CONSOLE = "115200 ttyS0"
 
 MACHINE_EXTRA_RRECOMMENDS = " kernel-modules"
 
-IMAGE_ROOTFS_SIZE_ext3 = "2000000"
 IMAGE_FSTYPES ?= "jffs2 tar.bz2"