diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5ad92419be19c5d67fae37158bac2b93e105d1bc..5a0a752f3ddd79bea4964b06907f822b9de9a05f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1330,8 +1330,16 @@ config MICROCODE_AMD
 	  processors will be enabled.
 
 config MICROCODE_OLD_INTERFACE
-	def_bool y
+	bool "Ancient loading interface (DEPRECATED)"
+	default n
 	depends on MICROCODE
+	---help---
+	  DO NOT USE THIS! This is the ancient /dev/cpu/microcode interface
+	  which was used by userspace tools like iucode_tool and microcode.ctl.
+	  It is inadequate because it runs too late to be able to properly
+	  load microcode on a machine and it needs special tools. Instead, you
+	  should've switched to the early loading method with the initrd or
+	  builtin microcode by now: Documentation/x86/microcode.txt
 
 config X86_MSR
 	tristate "/dev/cpu/*/msr - Model-specific register support"