diff --git a/src/galois/_domains/_calculate.py b/src/galois/_domains/_calculate.py
index 708a72234..c93cd68cd 100644
--- a/src/galois/_domains/_calculate.py
+++ b/src/galois/_domains/_calculate.py
@@ -464,7 +464,7 @@ def set_calculate_globals(self):
         ORDER = self.field.order
         MULTIPLY = self.field._multiply.ufunc
         POSITIVE_POWER = self.field._positive_power.ufunc
-        SUBFIELD_RECIPROCAL = self.field.prime_subfield._reciprocal.ufunc
+        SUBFIELD_RECIPROCAL = getattr(self.field.prime_subfield._reciprocal, self.field.ufunc_mode.replace("-", "_"))
 
     @staticmethod
     def calculate(a: int) -> int: