diff --git a/src/onedb/onedb_backend.rb b/src/onedb/onedb_backend.rb
index 3a4d0bcb86..ce89b8e9e0 100644
--- a/src/onedb/onedb_backend.rb
+++ b/src/onedb/onedb_backend.rb
@@ -375,7 +375,8 @@ class BackEndMySQL < OneDBBacKEnd
         when 'ascii'
             'ASCII'
         else
-            'NONE'
+            # if no encoding found, use the default one
+            NOKOGIRI_ENCODING
         end
     end