diff --git a/arch/ppc/Kconfig b/arch/ppc/Kconfig
index 10162b1..848f4397 100644
--- a/arch/ppc/Kconfig
+++ b/arch/ppc/Kconfig
@@ -905,6 +905,8 @@
 config HIGHMEM
 	bool "High memory support"
 
+source "mm/Kconfig"
+
 source "fs/Kconfig.binfmt"
 
 config PROC_DEVICETREE