diff --git a/mb/mb/hashes.py b/mb/mb/hashes.py
index 10bb5f2d..022e63f3 100644
--- a/mb/mb/hashes.py
+++ b/mb/mb/hashes.py
@@ -453,7 +453,7 @@ def calc_btih(self):
             b"4:name",
             str(len(self.basename)).encode("ASCII"),
             b":",
-            str(self.basename).encode("ASCII"),
+            str(self.basename).encode("UTF-8"),
             b"12:piece length",
             b"i",
             str(self.chunk_size).encode("ASCII"),