diff --git a/src/calibre/gui2/dialogs/metadata_single.py b/src/calibre/gui2/dialogs/metadata_single.py
index eb0c8fa555..da60495207 100644
--- a/src/calibre/gui2/dialogs/metadata_single.py
+++ b/src/calibre/gui2/dialogs/metadata_single.py
@@ -67,7 +67,7 @@ class MetadataSingleDialog(QDialog, Ui_MetadataSingleDialog):
     
     def add_format(self, x):
         files = choose_files(self, 'add formats dialog', 
-                             "Choose formats for " + str(self.title.text()),
+                             "Choose formats for " + qstring_to_unicode((self.title.text())),
                              [('Books', BOOK_EXTENSIONS)])
         if not files: 
             return