diff --git a/adet/evaluation/text_evaluation_all.py b/adet/evaluation/text_evaluation_all.py
index 1021d3c81..58ca3ba3b 100644
--- a/adet/evaluation/text_evaluation_all.py
+++ b/adet/evaluation/text_evaluation_all.py
@@ -93,9 +93,7 @@ def fis_ascii(s):
 
         def de_ascii(s):
             a = [c for c in s if ord(c) < 128]
-            outa = ''
-            for i in a:
-                outa +=i
+            outa = ''.join([i for i in a])
             return outa
 
         with open(file_path, 'r') as f: