diff --git a/ppocr/data/imaug/label_ops.py b/ppocr/data/imaug/label_ops.py
index 9b99d2ec80..af3308a553 100644
--- a/ppocr/data/imaug/label_ops.py
+++ b/ppocr/data/imaug/label_ops.py
@@ -95,7 +95,7 @@ class BaseRecLabelEncode(object):
             'ch', 'en', 'en_sensitive', 'french', 'german', 'japan', 'korean'
         ]
         assert character_type in support_character_type, "Only {} are supported now but get {}".format(
-            support_character_type, self.character_str)
+            support_character_type, character_type)
 
         self.max_text_len = max_text_length
         if character_type == "en":
diff --git a/ppocr/postprocess/rec_postprocess.py b/ppocr/postprocess/rec_postprocess.py
index 6943f84f87..a18e101bf4 100644
--- a/ppocr/postprocess/rec_postprocess.py
+++ b/ppocr/postprocess/rec_postprocess.py
@@ -27,7 +27,7 @@ class BaseRecLabelDecode(object):
             'ch', 'en', 'en_sensitive', 'french', 'german', 'japan', 'korean'
         ]
         assert character_type in support_character_type, "Only {} are supported now but get {}".format(
-            support_character_type, self.character_str)
+            support_character_type, character_type)
 
         if character_type == "en":
             self.character_str = "0123456789abcdefghijklmnopqrstuvwxyz"