diff --git a/ballpark/utils.py b/ballpark/utils.py
index d012f6f..18a0489 100644
--- a/ballpark/utils.py
+++ b/ballpark/utils.py
@@ -87,7 +87,15 @@ def unwrapped_function(values, *vargs, **kwargs):
         if scalar:
             values = [values]
 
-        results = fn(values, *vargs, **kwargs)
+        # Handle negative inputs by converting to positive, then correcting the output
+
+        is_negative = list(map(lambda x : x < 0, values))
+        multipliers = [-1 if negative else 1 for negative in is_negative]
+        positive_inputs = [value * multiplier for value, multiplier in zip(values, multipliers)]
+
+        positive_results = fn(positive_inputs, *vargs, **kwargs)
+
+        results = ["-" + positive_result if negative else positive_result for positive_result, negative in zip(positive_results, is_negative)]
 
         if scalar:
             results = results[0]