diff --git a/usbsdmux/i2c_gpio.py b/usbsdmux/i2c_gpio.py
index 7156487..c1ccc4d 100644
--- a/usbsdmux/i2c_gpio.py
+++ b/usbsdmux/i2c_gpio.py
@@ -114,7 +114,7 @@ class Pca9536(I2cGpio):
     """
 
     # The PCA9536 I2C slave Address in 7-Bit Format
-    _I2cAddr = 0x41
+    _I2cAddr = 0b100_0001
 
     gpio_0 = 0x01
     gpio_1 = 0x02
@@ -129,7 +129,7 @@ class Tca6408(I2cGpio):
     """
 
     # The TCA6408 I2C slave Address in 7-Bit Format
-    _I2cAddr = 0b0100_000
+    _I2cAddr = 0b010_0000
 
     gpio_0 = 0x01
     gpio_1 = 0x02
diff --git a/usbsdmux/usbsdmux.py b/usbsdmux/usbsdmux.py
index 923a23c..0eea25f 100644
--- a/usbsdmux/usbsdmux.py
+++ b/usbsdmux/usbsdmux.py
@@ -159,6 +159,7 @@ def get_mode(self):
 
         if val & self._select_DUT:
             return "dut"
+
         return "host"
 
     def mode_disconnect(self, wait=True):
@@ -244,6 +245,7 @@ def get_mode(self):
 
         if val & self._select_DUT:
             return "dut"
+
         return "host"
 
     def mode_disconnect(self, wait=True):