diff --git a/build/lib/pymatch/Matcher.py b/build/lib/pymatch/Matcher.py
index bf4537f..45adbcc 100644
--- a/build/lib/pymatch/Matcher.py
+++ b/build/lib/pymatch/Matcher.py
@@ -523,4 +523,5 @@ def assign_weight_vector(self):
     @staticmethod
     def _scores_to_accuracy(m, X, y):
         preds = [[1.0 if i >= .5 else 0.0 for i in m.predict(X)]]
-        return (y == preds).sum() * 1.0 / len(y)
+        # return (y == preds).sum() * 1.0 / len(y)
+        return (y.to_numpy().T == preds).sum() * 1.0 / len(y)