diff --git a/recipes-kernel/linux/ast2500/defconfig b/recipes-kernel/linux/ast2500/defconfig
index 626d67b..5e8e9b9 100755
--- a/recipes-kernel/linux/ast2500/defconfig
+++ b/recipes-kernel/linux/ast2500/defconfig
@@ -128,7 +128,7 @@
 # CONFIG_SERIO is not set
 # CONFIG_VT is not set
 # CONFIG_LEGACY_PTYS is not set
-# CONFIG_DEVMEM is not set
+CONFIG_DEVMEM_BOOTPARAM=y
 CONFIG_SERIAL_8250=y
 # CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y