diff --git a/conf/machine/cubieboard.conf b/conf/machine/cubieboard.conf
index f870918..1917cdf 100644
--- a/conf/machine/cubieboard.conf
+++ b/conf/machine/cubieboard.conf
@@ -15,7 +15,7 @@ UBOOT_LOADADDRESS = "0x40008000"
 
 SERIAL_CONSOLE = "115200 ttyS0"
 
-MACHINE_EXTRA_RRECOMMENDS = "\
+MACHINE_EXTRA_RRECOMMENDS += "\
  kernel-module-sw-ahci-platform \
  kernel-module-sunxi-emac \
 "
diff --git a/conf/machine/cubieboard2.conf b/conf/machine/cubieboard2.conf
index 9f9fa1c..2606275 100644
--- a/conf/machine/cubieboard2.conf
+++ b/conf/machine/cubieboard2.conf
@@ -15,7 +15,7 @@ UBOOT_LOADADDRESS = "0x40008000"
 
 SERIAL_CONSOLE = "115200 ttyS0"
 
-MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS = "\
+MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += "\
  kernel-module-sunxi-emac \
  "