diff --git a/powertop/README b/powertop/README
index 80c59aea7..1be1faf91 100644
--- a/powertop/README
+++ b/powertop/README
@@ -10,8 +10,10 @@ CONFIG_CPU_FREQ_GOV_ONDEMAND
 CONFIG_USB_SUSPEND
 CONFIG_SND_AC97_POWER_SAVE
 CONFIG_TIMER_STATS
+CONFIG_DEBUG_FS
+CONFIG_X86_MSR
 
-and to disable these:
+And be sure to disable these:
 CONFIG_IRQBALANCE
 CONFIG_ACPI_DEBUG