diff --git a/CHANGES b/CHANGES
index 15bbb2a7..0462cacb 100644
--- a/CHANGES
+++ b/CHANGES
@@ -14,6 +14,7 @@ SVN HEAD
            Delete support of non-sensor drivers (ddcmon, eeprom)
   Man page sensors.conf.5: Update the chip statement section
   Program isadump: Detect when address bit 7 is a busy flag
+                   Fix Super-I/O exit sequence for Winbond/Fintek chips
   Program mkpatch: Delete
   Program pwmconfig: Use smaller steps for low PWM values
   Program rrd: Support only hwmon class devices
diff --git a/prog/dump/superio.c b/prog/dump/superio.c
index 7a6b3efa..ac092635 100644
--- a/prog/dump/superio.c
+++ b/prog/dump/superio.c
@@ -66,6 +66,10 @@ void superio_write_key(int addrreg, unsigned char *key)
 
 void superio_reset(int addrreg, int datareg)
 {
+	/* Some chips (SMSC, Winbond) want this */
+	outb(0xaa, addrreg);
+
+	/* Return to "Wait For Key" state (PNP-ISA spec) */
 	outb(0x02, addrreg);
 	outb(0x02, datareg);
 }