--- a/src/pyams_content/shared/common/zmi/search.py	Tue Nov 27 08:50:37 2018 +0100
+++ b/src/pyams_content/shared/common/zmi/search.py	Tue Nov 27 14:57:36 2018 +0100
@@ -117,6 +117,7 @@
         query = self.request.params.get('query')
         if query:
             sequence = get_utility(ISequentialIntIds)
+            query = query.lower()
             if query.startswith('+'):
                 params &= Eq(catalog['oid'], sequence.get_full_oid(query))
             else: