diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
index 6d03530..26000f6 100644
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -46,6 +46,7 @@ CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_HZ_100=y
 CONFIG_BINFMT_MISC=m
+CONFIG_TRANSACTIONAL_MEM=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_KEXEC=y
 CONFIG_IRQ_ALL_CPUS=y
diff --git a/arch/powerpc/configs/pseries_defconfig b/arch/powerpc/configs/pseries_defconfig
index 5b8e1e5..b5f94b7 100644
--- a/arch/powerpc/configs/pseries_defconfig
+++ b/arch/powerpc/configs/pseries_defconfig
@@ -40,6 +40,7 @@ CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_HZ_100=y
 CONFIG_BINFMT_MISC=m
+CONFIG_TRANSACTIONAL_MEM=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_KEXEC=y
 CONFIG_IRQ_ALL_CPUS=y