diff --git a/uncompyle6/semantics/helper.py b/uncompyle6/semantics/helper.py
index 27c21a0d..78998bec 100644
--- a/uncompyle6/semantics/helper.py
+++ b/uncompyle6/semantics/helper.py
@@ -152,6 +152,9 @@ def is_lambda_mode(compile_mode: str) -> bool:
 
 
 def print_docstring(self, indent, docstring):
+    if isinstance(docstring, bytes):
+        docstring = docstring.decode("utf8", errors="backslashreplace")
+
     quote = '"""'
     if docstring.find(quote) >= 0:
         if docstring.find("'''") == -1: