diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index e96e69dd36fb4b4faba43ffad13b53815d06bc65..072c58008a633b713e1f68fd3a522572a41842d1 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -127,6 +127,7 @@ superio_enter(int ioreg)
 static inline void
 superio_exit(int ioreg)
 {
+	outb(0xaa, ioreg);
 	outb(0x02, ioreg);
 	outb(0x02, ioreg + 1);
 }