diff --git a/ppocr/postprocess/rec_postprocess.py b/ppocr/postprocess/rec_postprocess.py
index 347661b7d2dd5479aa077441da3bf2ecb01e2e13..f64ea1ce7a72641ccf7da8be9355e31968a030f7 100644
--- a/ppocr/postprocess/rec_postprocess.py
+++ b/ppocr/postprocess/rec_postprocess.py
@@ -799,7 +799,7 @@ class NRTRLabelDecode(BaseRecLabelDecode):
                 else:
                     conf_list.append(1)
             text = ''.join(char_list)
-            result_list.append((text.lower(), np.mean(conf_list).tolist()))
+            result_list.append((text, np.mean(conf_list).tolist()))
         return result_list