diff --git a/src/greenberry/utils/print.py b/src/greenberry/utils/print.py
index d9a253c..859ae64 100644
--- a/src/greenberry/utils/print.py
+++ b/src/greenberry/utils/print.py
@@ -54,7 +54,7 @@ def print_handling(g_vars, i, words):
         except:
             print(E.PRINT)
 
-    def printLE():
+    def printLE(self):
         """Print lexer error"""
         LEX_ERROR = "lex error: no EOF should used in the middle of file"
         print(LEX_ERROR)