diff --git a/src/opds_dumper.cpp b/src/opds_dumper.cpp
index fc1f01c1b..072c3ce79 100644
--- a/src/opds_dumper.cpp
+++ b/src/opds_dumper.cpp
@@ -241,7 +241,7 @@ std::string OPDSDumper::categoriesOPDSFeed() const
   const auto now = gen_date_str();
   kainjow::mustache::list categoryData;
   for ( const auto& category : library->getBooksCategories() ) {
-    const auto urlencodedCategoryName = urlEncode(category);
+    const auto urlencodedCategoryName = urlEncode(category, true);
     categoryData.push_back(kainjow::mustache::object{
       {"name", category},
       {"urlencoded_name",  urlencodedCategoryName},