diff --git a/target/linux/adm5120/Makefile b/target/linux/adm5120/Makefile
index 419c53434f1..56916bdcea0 100644
--- a/target/linux/adm5120/Makefile
+++ b/target/linux/adm5120/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 BOARD:=adm5120
 BOARDNAME:=Infineon/ADMtek ADM5120
-FEATURES:=low_mem
+FEATURES:=low_mem source-only
 SUBTARGETS:=router_le router_be rb1xx
 INITRAMFS_EXTRA_FILES:=
 
diff --git a/target/linux/adm8668/Makefile b/target/linux/adm8668/Makefile
index ddca8d4a275..cc82ec16064 100644
--- a/target/linux/adm8668/Makefile
+++ b/target/linux/adm8668/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=mipsel
 BOARD:=adm8668
 BOARDNAME:=Infineon WildPass ADM8668
-FEATURES:=squashfs usb pci
+FEATURES:=squashfs usb pci source-only
 MAINTAINER:=Florian Fainelli <florian@openwrt.org>
 
 KERNEL_PATCHVER:=3.18
diff --git a/target/linux/ar7/Makefile b/target/linux/ar7/Makefile
index c5a6035b53f..4a09aa09a42 100644
--- a/target/linux/ar7/Makefile
+++ b/target/linux/ar7/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=mipsel
 BOARD:=ar7
 BOARDNAME:=TI AR7
-FEATURES:=squashfs atm low_mem
+FEATURES:=squashfs atm low_mem source-only
 MAINTAINER:=Florian Fainelli <florian@openwrt.org>
 SUBTARGETS:=generic ac49x
 
diff --git a/target/linux/au1000/Makefile b/target/linux/au1000/Makefile
index debc41e978c..ddc28d0f099 100644
--- a/target/linux/au1000/Makefile
+++ b/target/linux/au1000/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=mipsel
 BOARD:=au1000
 BOARDNAME:=RMI/AMD AU1x00
-FEATURES:=squashfs usb pci
+FEATURES:=squashfs usb pci source-only
 SUBTARGETS:=au1500 au1550
 MAINTAINER:=Florian Fainelli <florian@openwrt.org>
 
diff --git a/target/linux/mcs814x/Makefile b/target/linux/mcs814x/Makefile
index 8ba58886e91..0f69bbe3225 100644
--- a/target/linux/mcs814x/Makefile
+++ b/target/linux/mcs814x/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=arm
 BOARD:=mcs814x
 BOARDNAME:=Moschip MCS814x
-FEATURES:=usb squashfs low_mem
+FEATURES:=usb squashfs low_mem source-only
 CPU_TYPE:=arm926ej-s
 MAINTAINER:=Florian Fainelli <florian@openwrt.org>
 
diff --git a/target/linux/xburst/Makefile b/target/linux/xburst/Makefile
index 2a64b7c46fa..16d0b8b1b40 100644
--- a/target/linux/xburst/Makefile
+++ b/target/linux/xburst/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 ARCH:=mipsel
 BOARD:=xburst
 BOARDNAME:=Ingenic XBurst
-FEATURES:=targz nand ubifs audio
+FEATURES:=targz nand ubifs audio source-only
 SUBTARGETS:=qi_lb60
 
 KERNEL_PATCHVER:=3.18