diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4640cee33f12..2fe51e0ad637 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -857,6 +857,7 @@ config THREAD_SHIFT
 	int "Thread shift" if EXPERT
 	range 13 15
 	default "15" if PPC_256K_PAGES
+	default "15" if PPC_PSERIES || PPC_POWERNV
 	default "14" if PPC64
 	default "13"
 	help