diff --git a/klippy/extras/sx1509.py b/klippy/extras/sx1509.py
index 27f335c9..a6c700fc 100644
--- a/klippy/extras/sx1509.py
+++ b/klippy/extras/sx1509.py
@@ -52,7 +52,7 @@ class SX1509(object):
                                  " clear_set_bits=%02x%02x" % (
                                      self._oid, REG_MISC, 0, (1 << 4)))
         # Transfer all regs with their initial cached state
-        for _reg, _data in self.reg_dict.iteritems():
+        for _reg, _data in self.reg_dict.items():
             self._mcu.add_config_cmd("i2c_write oid=%d data=%02x%04x" % (
                 self._oid, _reg, _data), is_init=True)
     def setup_pin(self, pin_type, pin_params):