diff --git a/CircuitPython_RPN_Calculator/code.py b/CircuitPython_RPN_Calculator/code.py
index 6a282ea04..7f5de552f 100644
--- a/CircuitPython_RPN_Calculator/code.py
+++ b/CircuitPython_RPN_Calculator/code.py
@@ -7,6 +7,7 @@ from adafruit_display_text.label import Label
 from adafruit_hid.keyboard import Keyboard
 from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
 from jepler_udecimal import Decimal, getcontext, localcontext
+import jepler_udecimal.utrig  # Needed for trig functions in Decimal
 import board
 import digitalio
 import displayio