diff --git a/target/linux/adm5120/Makefile b/target/linux/adm5120/Makefile
index e58122db076..7298a240453 100644
--- a/target/linux/adm5120/Makefile
+++ b/target/linux/adm5120/Makefile
@@ -9,6 +9,7 @@ include $(TOPDIR)/rules.mk
 
 BOARD:=adm5120
 BOARDNAME:=Infineon/ADMtek ADM5120
+FEATURES:=low_mem
 KERNEL_PATCHVER:=3.8
 SUBTARGETS:=router_le router_be rb1xx
 INITRAMFS_EXTRA_FILES:=
diff --git a/target/linux/adm5120/rb1xx/target.mk b/target/linux/adm5120/rb1xx/target.mk
index 2e9b08e5112..34d10a96492 100644
--- a/target/linux/adm5120/rb1xx/target.mk
+++ b/target/linux/adm5120/rb1xx/target.mk
@@ -2,7 +2,7 @@ ARCH:=mipsel
 ARCH_PACKAGES:=adm5120_mipsel
 SUBTARGET:=rb1xx
 BOARDNAME:=MikroTik RB-1xx boards
-FEATURES:=tgz
+FEATURES+=tgz
 
 define Target/Description
 	Build firmware images for Mikrotik RB-1xx series.
diff --git a/target/linux/adm5120/router_be/target.mk b/target/linux/adm5120/router_be/target.mk
index 3777ccf1ca6..9cbf00b3eb3 100644
--- a/target/linux/adm5120/router_be/target.mk
+++ b/target/linux/adm5120/router_be/target.mk
@@ -2,7 +2,7 @@ ARCH:=mips
 ARCH_PACKAGES:=adm5120_mips
 SUBTARGET:=router_be
 BOARDNAME:=Big Endian
-FEATURES:=squashfs
+FEATURES+=squashfs
 
 define Target/Description
 	Build firmware images for Infineon/ADMTek ADM5120 based boards
diff --git a/target/linux/adm5120/router_le/target.mk b/target/linux/adm5120/router_le/target.mk
index f4eac8b587f..6847d00e140 100644
--- a/target/linux/adm5120/router_le/target.mk
+++ b/target/linux/adm5120/router_le/target.mk
@@ -2,7 +2,7 @@ ARCH:=mipsel
 ARCH_PACKAGES:=adm5120_mipsel
 SUBTARGET:=router_le
 BOARDNAME:=Little Endian
-FEATURES:=squashfs tgz
+FEATURES+=squashfs tgz
 
 define Target/Description
 	Build firmware images for Infineon/ADMtek ADM5120 based boards