diff --git a/decoding/utils_eval.py b/decoding/utils_eval.py
index 63fbb41..75d9233 100644
--- a/decoding/utils_eval.py
+++ b/decoding/utils_eval.py
@@ -80,9 +80,9 @@ def score(self, ref, pred):
         scores = []
         for ref_seg, pred_seg in zip(ref, pred):
             if len(ref_seg) == 0 : error = 1.0
-            else: error = wer(ref_seg, pred_seg)
+            else: error = wer(' '.join(ref_seg), ' '.join(pred_seg))
             if self.use_score: scores.append(1 - error)
-            else: use_score.append(error)
+            else: scores.append(error)
         return np.array(scores)
     
 """