diff --git a/androguard/core/bytecodes/apk.py b/androguard/core/bytecodes/apk.py
index <HASH>..<HASH> 100644
--- a/androguard/core/bytecodes/apk.py
+++ b/androguard/core/bytecodes/apk.py
@@ -1024,7 +1024,7 @@ class APK:
         ]
 
     def is_tag_matched(self, tag, **attribute_filter):
-        """
+        r"""
         Return true if the attributes matches in attribute filter.
 
         An attribute filter is a dictionary containing: {attribute_name: value}.
fixs docstring in issue #<I> by pyupgrade