diff --git a/target/linux/rb532/config-2.6.28 b/target/linux/rb532/config-2.6.28
index 23b068d8d4..a02f46a0d3 100644
--- a/target/linux/rb532/config-2.6.28
+++ b/target/linux/rb532/config-2.6.28
@@ -122,6 +122,8 @@ CONFIG_MTD_PHYSMAP=y
 CONFIG_MTD_PHYSMAP_BANKWIDTH=2
 CONFIG_MTD_PHYSMAP_LEN=0
 CONFIG_MTD_PHYSMAP_START=0x8000000
+# CONFIG_MTD_ROOTFS_ROOT_DEV is not set
+# CONFIG_MTD_ROOTFS_SPLIT is not set
 # CONFIG_NATSEMI is not set
 CONFIG_NF_CONNTRACK=y
 CONFIG_NF_CT_ACCT=y