diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 2b37820555bc4d2ee33c2e9911931c58a964735f..1a8f682248ce59a17d7b2ee2e690d827e8b1729f 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -126,9 +126,6 @@ config CMDLINE_FORCE
 	  Set this to have arguments from the default kernel command string
 	  override those passed by the boot loader.
 
-config OF
-	bool
-
 config PROC_DEVICETREE
 	bool "Support for device tree in /proc"
 	depends on PROC_FS
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 369723183002df5a20bd878130db8225112fe3ae..402f4c028eb81c29254745b3ebb5dc874a873554 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -174,9 +174,6 @@ config ARCH_MAY_HAVE_PC_FDC
 config PPC_OF
 	def_bool y
 
-config OF
-	bool
-
 config PPC_UDBG_16550
 	bool
 	default n
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index d02e8ac7aa105f07d2996b7f0dc84f8fe3a5359c..13a9f2f8738cfa55a4ccfb72ec63e0c18796c86e 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -149,9 +149,6 @@ config GENERIC_GPIO
 config ARCH_NO_VIRT_TO_BUS
 	def_bool y
 
-config OF
-	bool
-
 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 	def_bool y if SPARC64