diff --git a/CHANGES.rst b/CHANGES.rst
index c3ce36e..fc140ff 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,6 +5,9 @@ Changelog
 1.0 (unreleased)
 ----------------
 
+- Fixed UnicodeDecodeError in @@autocomplete-search
+  [vincentfretin]
+
 - Internationalized two messages.
   [vincentfretin]
 
diff --git a/src/collective/contact/widget/widgets.py b/src/collective/contact/widget/widgets.py
index 4691d6f..78ffc36 100644
--- a/src/collective/contact/widget/widgets.py
+++ b/src/collective/contact/widget/widgets.py
@@ -268,5 +268,5 @@ class AutocompleteSearch(BaseAutocompleteSearch):
         else:
             terms = set()
 
-        return '\n'.join(["|".join((t.token, t.title or t.token, t.portal_type, t.url, t.extra))
+        return u'\n'.join([u"|".join((t.token, t.title or t.token, t.portal_type, t.url, t.extra))
                             for t in sorted(terms, key=lambda t: t.title)])