diff --git a/vdirsyncer/utils/compat.py b/vdirsyncer/utils/compat.py
index 1e499e0..f4c5d4d 100644
--- a/vdirsyncer/utils/compat.py
+++ b/vdirsyncer/utils/compat.py
@@ -27,7 +27,7 @@ def _wrap_native(f, encoding='utf-8'):
     @functools.wraps(f)
     def wrapper(x, *a, **kw):
         to_orig = to_unicode if isinstance(x, text_type) else to_bytes
-        return to_orig(f(to_native(x, encoding), *a, **kw))
+        return to_orig(f(to_native(x, encoding), *a, **kw), encoding)
     return wrapper