diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 26126d2..45e86c7 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -14,6 +14,11 @@
 	bool
 	default y if PPC64
 
+config WORD_SIZE
+	int
+	default 64 if PPC64
+	default 32 if !PPC64
+
 config PPC_MERGE
 	def_bool y