diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 9c39095b33fc0d1dbdc7f92408314dae1ed38e87..bc2fbadff9f90fe681d9c30ae621d1ec94e348cf 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1803,7 +1803,7 @@ config DMAR
 	  remapping devices.
 
 config DMAR_DEFAULT_ON
-	def_bool n
+	def_bool y
 	prompt "Enable DMA Remapping Devices by default"
 	depends on DMAR
 	help