diff --git a/docs/source/BOM.rst b/docs/source/BOM.rst
index 9decb7e2b..ead8d30f5 100644
--- a/docs/source/BOM.rst
+++ b/docs/source/BOM.rst
@@ -47,9 +47,11 @@ These are the electronic bits needed to build the Display/Keypad unit that fits
      - `https://www.waveshare.com/wiki/1.5inch_RGB_OLED_Module <https://www.waveshare.com/wiki/1.5inch_RGB_OLED_Module>`_
      - 
    * - 1
-     - Adafruit IMU Fusion Breakout - BNO055
+     - Adafruit IMU Fusion Breakout - BNO055 - **See Note**
      - https://www.adafruit.com/product/4646
-     - 
+     - Order product 4646 exactly. Adafruit sells another BNO055 board (product
+       2472) that looks very similar, but its data pins are in a different
+       order and it does not work in the PiFinder
    * - 1
      - 2x20 40 Pin Stacking Female Header
      - https://www.amazon.com/dp/B0827THC7R