diff --git a/adafruit_mma8451.py b/adafruit_mma8451.py
index aa31fd7..5dfc29b 100644
--- a/adafruit_mma8451.py
+++ b/adafruit_mma8451.py
@@ -28,7 +28,10 @@
 
 * Author(s): Tony DiCola
 """
-import ustruct
+try:
+    import struct
+except ImportError:
+    import ustruct as struct
 
 from micropython import const
 
@@ -188,7 +191,7 @@ def acceleration(self):
         # Read 6 bytes for 16-bit X, Y, Z values.
         self._read_into(_MMA8451_REG_OUT_X_MSB, self._BUFFER, count=6)
         # Reconstruct signed 16-bit integers.
-        x, y, z = ustruct.unpack('>hhh', self._BUFFER)
+        x, y, z = struct.unpack('>hhh', self._BUFFER)
         x >>= 2
         y >>= 2
         z >>= 2
diff --git a/docs/conf.py b/docs/conf.py
index 071b26a..2261eed 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -18,7 +18,7 @@
 # Uncomment the below if you use native CircuitPython modules such as
 # digitalio, micropython and busio. List the modules you use. Without it, the
 # autodoc module docs will fail to generate with a warning.
-autodoc_mock_imports = ["digitalio", "busio", "ustruct", "micropython", "adafruit_bus_device", "adafruit_bus_device.i2c_device"]
+autodoc_mock_imports = ["digitalio", "busio", "micropython", "adafruit_bus_device", "adafruit_bus_device.i2c_device"]
 
 intersphinx_mapping = {'python': ('https://docs.python.org/3.4', None),'BusDevice': ('https://circuitpython.readthedocs.io/projects/bus_device/en/latest/', None),'CircuitPython': ('https://circuitpython.readthedocs.io/en/latest/', None)}