diff --git a/beets/util/__init__.py b/beets/util/__init__.py
index e13b67604..411202075 100644
--- a/beets/util/__init__.py
+++ b/beets/util/__init__.py
@@ -210,7 +210,9 @@ def sorted_walk(
     """
     # Make sure the paths aren't Unicode strings.
     bytes_path = bytestring_path(path)
-    ignore = [bytestring_path(i) for i in ignore]
+    _ignore = [  # rename prevents mypy variable shadowing issue
+        bytestring_path(i) for i in ignore
+    ]
 
     # Get all the directories and files at this level.
     try:
@@ -230,7 +232,7 @@ def sorted_walk(
 
         # Skip ignored filenames.
         skip = False
-        for pat in ignore:
+        for pat in _ignore:
             if fnmatch.fnmatch(base, pat):
                 if logger:
                     logger.debug(
@@ -257,7 +259,7 @@ def sorted_walk(
     # Recurse into directories.
     for base in dirs:
         cur = os.path.join(bytes_path, base)
-        yield from sorted_walk(cur, ignore, ignore_hidden, logger)
+        yield from sorted_walk(cur, _ignore, ignore_hidden, logger)
 
 
 def path_as_posix(path: bytes) -> bytes: