diff --git a/mm/Kconfig b/mm/Kconfig
index 50f7cfc..79360cf 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -161,3 +161,9 @@
 	default 64BIT
 	help
 	  This option allows memory and IO resources to be 64 bit.
+
+config ZONE_DMA_FLAG
+	int
+	default "0" if !ZONE_DMA
+	default "1"
+