diff --git a/gramps/plugins/tool/check.py b/gramps/plugins/tool/check.py
index a74e85a92..ce9ac77cd 100644
--- a/gramps/plugins/tool/check.py
+++ b/gramps/plugins/tool/check.py
@@ -76,7 +76,7 @@ from gramps.gui.plug import tool
 from gramps.gui.dialog import OkDialog, MissingMediaDialog
 from gramps.gen.display.name import displayer as _nd
 from gramps.gui.glade import Glade
-from gramps.gen.constfunc import UNITYPE, cuni, handle2internal
+from gramps.gen.constfunc import UNITYPE, cuni, handle2internal, conv_to_unicode
 
 # table for handling control chars in notes.
 # All except 09, 0A, 0D are replaced with space.