diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 2b37820555b..1a8f682248c 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 36972318300..402f4c028eb 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 d02e8ac7aa1..13a9f2f8738 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